[stronghold] 25 AMP
[ stronghol d ]
25 AM P
O P E R A T I N G
M A N U A L
MANUAL DE FUNCIONAMIENTO • MANUEL D'UTILISATION • BENUTZERHANDBUCH • 運用マニュアル
CONTENTS
1.Specifications
2. Exterior of the unit
3.Features
4. Cell Type Charge Parameters
5. Warnings and safety notes
6. Connecting the charger
7. Balance Socket
8. Watt hour application chart
9. Program flow chart
10. Initial Parameter set up (Users’ set up)
11. Lithium battery (Lilo/LiPO/LiFe) program
11.1 Charging Lithium batteries
11.2 Charging Lithium batteries in balance mode
11.3 “FAST” Charging Lithium batteries
11.4 “STORAGE” Control Lithium batteries
11.5 Discharging Lithium batteries
11.6 Voltage balancing and monitoring during discharge
12. NiMH/NiCD battery program
12.1 Charging NiCD/NiMH batteries
12.2 Discharging NiCD/NiMH batteries
12.3 Charge-to-discharge & discharge-to-charge cycle NiMH/NiCD batteries
13. Pb (lead-sulphuric acid) battery program
13.1 Charging Pb batteries
13.2 Discharging Pb batteries
14. IR-mode™ Internal Resistance Test Program
15. Save Data Program
16. Load Data Program
17. Alternate charge screens
18. Warning and error messages
19. Glossary of terms
20. Warranty and service
21. Notes page
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[ stronghold]
SPECIFICATIONS
[STRONGHOLD]
Safety Charging Box
Balance Port
Temperature Sensor Port
Input power cable
(DC 11V - 26V)
Charging lead connector
(4 mm banana female)
Cooling Fan
Batt type / Stop
To select main program
To stop the operation
Dec / Inc
To select sub program
To alter the value
Start / Enter
To resume or
start the operation
LCD screen
(16chr. x 2 lines)
Input Voltage: 11.0-26.0V
Circuit Power: 500W max charge / 25W max discharge
Charge Current: 0.1-25.0A (0.1-10.0A for NiCD/NiMH)
Discharge Current: 0.1-5.0A
Current Drain for LiPO Balance: 200mAh/cell
NiCD/NiMH Cell Count: 1-18 Series
Lithium Cell Count: 1-6 Series
Pb Voltage: 2-24V
Alarm Voltage: Lower than 10V or greater than 26V
Weight: 4lbs 1.25oz (1850g)
Dimensions: 12.6x7.87x3.15 in (320x200x80mm)
[2 ]
FEATURES
[Battery Charge Box]
Integrated battery charging box designed to help contain a battery in case of catastrophic failure. Box
will help contain debris, and flame, while venting releases gases and smoke in a controlled manner.
[Operating Software]
The microprocessor controlled CPU has software with multiple levels of battery monitoring for
maximum safety. Error warnings include: input voltage warning, reverse polarity protection and
Lithium cell count input error warning.
[High Power Charge Circuit]
500-watt charge circuit can charge up to 18 NiCD/NiMH or 6 Lithium cells with a maximum current
of 25A. A temperature controlled internal cooling system keeps the whole operating system
working at maximum efficiency in a wide variety of conditions.
[High Voltage Input]
The Venom Stronghold DC Multi-charger was designed to accept a broad range of input voltage up
to 26V. Customers can now use a higher voltage, yet low current power supply, which will operate
more efficiently.
[Cell Balancer for Lithium]
A built-in monitoring circuit can check and regulate the voltage of individual cells in a Lithium
battery pack. It can monitor and balance packs in charge, discharge, and storage modes.
[Supports Multiple Lithium Chemistries]
Accepts three types of Lithium battery chemistries, including LiPO, LiIo, and LiFe.
[Lithium Storage and Fast Charge Modes]
Storage mode conditions Lithium batteries for long-term storage. Fast charge mode safely charges
Lithium batteries at high rates without risk of damaging the pack.
[Multiple Safety Guards]
Auto Charge current limit: When charging NiCD or NiMH batteries in Auto mode, you can set the
upper limit of charge current to avoid over-heating and damaging the pack.
[Capacity Limit]
If charging capacity reaches this limit before a pack peaks, charger will stop charging to prevent
over charging in case the battery is damaged and the charger does not detect the peak.
[Temperature Limit]
Using the included external temperature probe, a thermal shut down temperature can be set. This
will stop the charge or discharge process should a battery exceed the temperature limit to prevent
overcharging, fire, or other damage.
[Safety Timer]
This will stop the charge or discharge process if the charger cannot detect a peak, or if the capacity
limit is not tripped.
[3 ]
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FEATURES (CONTINUED)
[Input Power Monitor]
Charging or discharging processes will stop if the input voltage is too low. This is to protect the
input source, usually a 12V car battery.
CELL TYPE CHARGE PARAMETERS
The chart below has all the basic charge parameters for different cell types. Actual
charge and discharge rates or voltages may vary by manufacturer or recommended cell
performance. Always consult with the manufacturer instructions for your specific battery
for proper charge parameters.
NiCD / NiMH
Voltage Level: 1.2V/cell
Allowable fast charge current: 1C~2C
(Depends on the performance of the cell)
Discharge voltage cut-off level: 0.85V/cell (NiCD), 1.0V/cell (NiMH)
Lilo
Voltage Level: 3.6V/cell
Max charge voltage: 4.1V/cell
Allowable fast charge current: 1C or less
Minimum discharge voltage cut-off level: 2.5V/cell or higher
LiPO
Voltage Level: 3.7V/cell
Max charge voltage: 4.2V/cell
Allowable fast charge current: 1C or less
Discharge voltage cut-off level: 3.0V/cell or higher
LiFe
Voltage Level: 3.3V/cell
Max charge voltage: 3.7V/cell
Allowable fast charge current: 4C or less (e.g. A123M1)
Discharge voltage cut-off level: 2.0V/cell or higher
Pb
Voltage Level: 2.0V/cell (Lead-acid)
Max charge voltage: 2.46V/cell
Allowable fast charge current: 0.4C or less
Discharge voltage cut-off level: 1.50V/cell or higher
[4 ]
CHARGING WARNINGS
WARNING
1. Always use a charger specifically designed for the chemistry of the battery to be charged.
Never use NiCD or NiMH type chargers to charge LiPO batteries. Never use a LiPO type
charger to charge NiCD or NiMH batteries. Failure to do so will damage the batteries and
may cause fire and personal injury. When charging NiMH batteries, you must use a linear
charger with peak detection. Do not use a timer charger. Charge battery at no higher than a
1C charge rate. To calculate your battery’s 1C charge rate, divide the battery capacity (mAh)
by 1000.
Example: 3000mah ÷ 1000 = 3amps, 4200mah ÷ 1000 = 4.2amps, etc.
2. Always charge batteries in a fire proof container. Do not charge batteries on or near wood,
cloth, carpet, in your model, or on or near any other flammable material. Keep a chemical fire
extinguisher near by in case of fire.
3. Never leave batteries unattended while charging. Always observe batteries when charging
so that you may react quickly to any problems that may occur.
4. If a battery is deformed, swollen or appears damaged, DO NOT CHARGE. Follow the disposal
instructions below to properly and safely dispose the battery.
5. Any time you have an accident with your model or if the battery swells “balloons” or if the
battery exceeds temperature guidelines, follow these safety steps:
a. Immediately remove the battery pack from your model or charger.
b. Place the battery in a non-flammable, well ventilated area.
c. Observe the battery for 30 minutes from a safe distance.
d. After 30 minutes, if the pack appears stable, is not swollen and does not show any signs
of damage, return the battery pack to normal use with caution.
6. Do not let exposed battery wires touch each other. This may cause the battery to short and
potentially cause a fire.
7. Store your batteries in a cool, dry place between 40-80 Fº / 4-26 Cº. Batteries must be stored
at 3.75-3.80 volts per cell to maintain capacity and pack life for LiPO batteries. Do not store
fully charged for longer than one week to prevent damage.
8. Do not assemble unmatched or dissimilar cells.
9. Store battery packs out of the reach of children and pets.
LIPO BATTERY DISPOSAL INSTRUCTIONS
* NOTE: Please contact Venom™ Customer Service prior to following the steps below:
1. Fill a bucket with enough water to submerge the battery pack completely.
2. Add salt to the water until no more salt will dissolve; the water is now saturated with salt.
3. Place the battery pack in the bucket and leave submerged in the salt water solution for 24 hours.
4. Remove the battery pack from the salt water and test the voltage.
5. If the voltage does not read 0.0 Volts, re-submerge and re-test until the voltage reads 0.0 Volts.
6. Once the battery pack has been discharged to 0.0 Volts, it is safe to dispose of in the trash.
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CONNECTING THE CHARGER
The Venom Stronghold 25 amp DC Multi-Charger comes with male 4mm bullet
connectors attached to the power input cables. These cables are appropriate
for attaching directly to most high quality AC to DC power supply units. Also
included are large alligator clips with matching 4mm female bullet connectors
for attaching directly to 12V car batteries. It is critically important that you use
either a fully charged 13.8V car battery or a high quality AC to DC power supply
in the range of 11-26V.
When hooking up the battery to be charged, always use high quality cables with
connectors of good quality and condition. Place the battery inside the charge
box and secure the lid with the latch. In the event of a catastrophic failure, this
will help contain flames and debris.
Using Alligator
Clips attached
to car battery.
IMPORTANT
CONNECTING THE BATTERY
Before connecting a battery, it is absolutely essential to check one last time
that you have set the parameters correctly. If the settings are incorrect, the
battery may be damaged, and could even burst into flames or explode. To avoid
short-circuits between the banana plugs, always connect the charge leads
to the charger first, and only then to the battery. Reverse the sequence when
disconnecting the pack.
[6 ]
BALANCE SOCKET
The balance wire attached to the battery must be connected to the charger’s
balancing port. Take care to maintain correct polarity!
(Wiring diagram: see below.)
This photo shows the correct way to connect your battery to the Stronghold 25
amp DC Multi-Charger while charging in the balance charge program mode only.
NOTE:
The balance socket is a diagnostic connection only. Battery discharge leads
must be connected to allow for a proper charge connection.
WARNING
Failure to connect as shown in this photo will damage this charger.
To avoid short circuit between the charge lead, always connect the charge
cable to the charger first, then connect the battery. Reverse the sequence when
disconnecting.
WARNING
The use of the Stronghold Solo charging box does not eliminate the risks of a
lithium polymer battery fire. Users should always follow the safety warnings,
instructions and guidelines provided by their battery and charger manufacturers
in connection with this product.
[7 ]
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WATT HOUR APPLICATION CHART
Voltage
7.4
7.4
7.4
7.4
7.4
7.4
11.1
11.1
11.1
11.1
11.1
14.8
14.8
14.8
14.8
18.5
18.5
22.2
22.2
Capacity (mAh)
3200
4000
5000
5800
8000
WILL NOT BE
10000 PROPERLY
CONTAINED
2200
3200
4000
5400
WILL NOT BE
6400
PROPERLY CONTAINED
2200
3200
4000
5000
3200
WILL NOT BE
4000
PROPERLY CONTAINED
2200
2600
NOTE FOR USE
Watt Hours
23.7
29.6
37.0
42.9
59.2
WILL NOT BE
74.0 PROPERLY
CONTAINED
24.4
35.5
44.4
59.9
WILL NOT BE
71.0 PROPERLY
CONTAINED
32.6
47.4
59.2
74.0
59.2
WILL NOT BE
74.0 PROPERLY
CONTAINED
48.8
57.7
The charge box of the Venom Stronghold 25 amp DC Multi-Charger is designed to
help contain up to a 60 Watt-hour battery. Packs larger than this may not be properly
contained due to the expansive volume of the pack during catastrophic failure.
Calculate Watt Hours
(Nominal Voltage x mAh)/1000 = Watt Hours
[8 ]
PROGRAM FLOW CHART
[9 ]
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USER SETUP
The Venom Stronghold 25 amp DC Multi-Charger has default
settings in the User Set menu that can be adjusted in this
first step. The screen displays the following information
in sequence and the user can change the value of the
parameter on each screen.
When you want to alter the parameter value in the program, press the Start/
Enter button once. The value will start flashing, and it can be changed by using
the INC or DEC buttons, and finally saved by pressing the Start/Enter button
once.
USER SETUP STARTING SCREEN
The screen displays the nominal voltage of a Lithium
battery. There are three kinds of Lithium batteries: LiFe
(3.3V), LiIO (3.6V) or LiPO (3.7V). It is very important to check
the battery and set up correctly for the chemistry type. If it
is different from the correct value, the battery may explode
during the charge process.
The Venom Stronghold 25 amp DC Multi-Charger recognizes
the cell count of Lithium batteries automatically at the
beginning of the charge or discharge process to avoid
erroneous settings by the user. The Stronghold charger can recognize a deeply
discharged battery incorrectly. To prevent the error, you can set the time term
to verify the cell count by the processor. Normally, 10 minutes is enough to
perceive the cell count correctly. For a battery of larger capacity, you may
extend the time term. If you set the time term too long for a battery of smaller
capacity, the charge or discharge process may finish within the time term
with the erroneous cell count. This may cause fatal results. If the processor
recognizes the cell count incorrectly at the beginning of the charge or discharge
process, you may extend the time. Otherwise use the default value.
DELTA PEAK OF NICD AND NIMH BATTERY
This is the setting to set the sensitivity for the charger to
detect the peak on a NiCD or NiMH battery. The effective
value ranges from 5 to 20 mV per cell. If the trigger
voltage is set higher, there is a danger of overcharging the
battery. If it is set lower, there is a possibility of premature
termination. Please refer to the technical specification of
the battery. (NiCD default: 12mV, NiMH default: 7mV)
[ 10 ]
USER SETUP (CONTINUED)
An optional feature to protect the battery is the external
temperature probe. The temperature cut-off can be On or Off.
If it is On, set the maximum temperature at which the charger
should allow battery to reach during charge. Once a battery
reaches this temperature during charge, the process will be
terminated to protect the battery.
When using the battery cycle feature of charging and
discharging, a battery will become warm after the charge
or discharge period. This program can insert a time delay to
occur after each charge and discharge process to allow the
battery adequate time to cool down before being subjected to
the next process. The value ranges from 1-60 minutes.
When you start a charge process, the integral safety
timer automatically starts running at the same time. This is
programmed to prevent overcharging the battery if it proves
to be faulty, or if the termination circuit cannot detect that
the battery is full. The value for the safety timer should be
generous enough to allow a full charge of the battery.
This program sets the maximum charge capacity that will
be supplied to the battery during charge. If the delta peak
voltage is not detected nor the safety timer expired for
reason, this feature will automatically stop the process at the
selected capacity value.
The beep sounds every time a button is pressed to confirm
your action. The beep or melody sounds at various times
during operation to alert different mode changes. These
audible sounds can be On or Off.
This program monitors the input voltage of the source. If the
voltage drops below the value you set the operation forcibly
terminated to protect the input source.
[ 11 ]
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LITHIUM BATTERY PROGRAM (LIPO/LIIO/LIFE)
These programs are only suitable for charging and discharging Lithium batteries
with a nominal voltage of 3.3V, 3.6V and 3.7V per cell. Lithium batteries use a
charge technique termed constant voltage (CV) and constant current (CC). The
charge current varies according to the battery capacity and performance. The
final voltage of charge process is also very important. It should be precisely
matched to the charge voltage of the battery. They are 4.2V for LiPO, 4.1V for
LiIo, and 3.6V for LiFe. The charge current and nominal voltage as for cell count
set on the charge program must always be correct for the battery to be charged.
To alter a parameter value in the program, press Start/Enter button to make it
flash then change the value with INC or DEC button. The value will be stored by
pressing Start/Enter button once.
CHARGING LITHIUM BATTERY
The left side of the first line shows the type of battery
you select in the User Set menu. The value on the left
side of second line sets the charge current and the value
on the right side of second line sets the voltage of the
battery pack.
After setting the current and voltage press Start/Enter
button for more than 3 seconds to start the process.
Charge current : 0.1-25A, Voltage: 1-6 Series
After pressing start, the charger will display the number
of cells you set up and the processor detects. “R” shows
the number of cells recognized by the charger and “S” is
the number of cells selected by the user on the previous
screen. If both numbers are identical you can start
charging by pressing Start/Enter button. If not, press the
Batt Type/Stop button to go back to previous screen.
Carefully check the number of cells of the battery pack
and then press Start/Enter to charge again.
The screen shows the real-time progress during charge
process. To stop charging press Batt Type/Stop button
once.
[ 12 ]
BALANCE CHARGING LITHIUM BATTERY
This feature will charge while equalizing all the
individual cell voltages within the pack. This differs from
the regular charge mode, which only looks at the total
battery pack voltage. The battery pack to be charged
should be connected to the suitable balance port of the
cell balance block. You also need to connect the main
battery output plug to the output of the charger.
The left side of the first line shows the type of battery
you select at the users setting. The value on the left
side of second line sets a charge current and the value
on the right side of second line sets the voltage of the
battery pack.
After setting the current and voltage press Start/Enter
button for more than 3 seconds to start the process.
Charge current: 0.1-25A, Voltage: 1-6 Series
After pressing start, the charger will display the number
of cells you set up and the processor detects. “R” shows
the number of cells recognized by the charger and “S” is
the number of cells selected by the user on the previous
screen. If both numbers are identical you can start
charging by pressing Start/Enter button. If not, press the
Batt Type/Stop button to go back to previous screen.
Carefully check the number of cells of the battery pack
and then press Start/Enter to charge again.
The screen shows the real-time progress during charge
process. To stop charging press Batt Type/Stop button
once.
[ 13 ]
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FAST CHARGING LITHIUM BATTERY
Lithium charge profiles are set so the feeding current gradually reduces near the end of
the charge to maintain the constant voltage. (CV)
To finish the charging process faster, this program shortens the amount of time for the CV
process and ends earlier. The charging current will go to 1/5 from the initial value to end
the process while the normal Lithium charge process reduces to 1/10 during the CV term.
The final charged capacity will be slightly less than if using the regular charge feature,
and charge time is greatly reduced.
You can set up the charging current and the voltage of the
battery pack being charged. As you press Start/Enter button
the voltage confirmation will be displayed. Then if you confirm
the voltage and current, press Start/Enter button again to start
charging.
The screen shows the real-time progress during fast charge
process. To stop charging, press Batt Type/Stop button once.
STORAGE MODE FOR LITHIUM BATTERY
Lithium batteries, if they are to be stored for a long time, need to be conditioned and
have their voltage set to a prescribed level to maintain long life. If stored fully charged
for a long period of time, packs will increase in internal resistance, and lose power, or
capacity. Use the storage feature for batteries that will be stored for more than 30 days.
This program will determine to charge or discharge the battery to the storage voltage
depending on the battery at its initial stage. They are different from the type of Lithium
battery. 3.75V for LiIo, 3.85V for LiPO, and 3.3V for LiFe per cell. If the voltage of battery
at the start is over the storage voltage, the program will start to discharge.
You can set up the current and the voltage of the battery pack
to be charged. The current will be used to charge or discharge
the battery to reach the storage voltage.
The screen shows the real-time progress during storage
process. To stop charging, press Batt Type/Stop button once.
[ 14 ]
DISCHARGING LITHIUM BATTERIES
The value of discharge current on the left side of the
screen may not exceed 1C for a maximum safety and the
final voltage on the right should not be under the voltage
level that is recommended by the battery manufacturer to
avoid deep discharging.
To start the discharge, press Start/Enter button for more
than 3 seconds.
Discharge current: 0.1-5A
The screen shows the real-time progress during
discharge. To stop charging, press Batt Type/Stop button
once.
VOLTAGE BALANCING AND MONITORING DURING DISCHARGE
The processor monitors the voltage of individual cells during storage mode
and discharge of a lithium battery pack. With the balance block attached to the
balance plug of the battery, it will equalize the voltage of each cell during the
storage and discharge function.
If the voltage of any one or more cells varies abnormally during the procedure,
it terminates the process automatically with the error message “Battery Voltage
Cell Low Vol”. If this happens, the battery pack contains the bad cell, or the bad
connection of the cable plug. You can easily know which
one cell is bad by pressing INC button at the time of the
error message.
The processor detected the voltage of one cell in the
Lithium pack is too low.
In this case, the 4th cell is bad. If there is a connection
break in the cable or plug, the voltage value may show
zero.
[ 15 ]
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NIMH/NICD BATTERIES
This battery charge profiles for NiMH (Nickel Metal Hydride) or NiCD (Nickel
Cadmium) batteries are commonly used in R/C vehicle applications. To alter the
value on the display, press Start/Enter button to make it flash then change the
value using INC or DEC button. The value will be stored by pressing the Start/
Enter button once.
To start the charge process, press Start/Enter button for more than 3 seconds.
CHARGING NICD/NIMH BATTERY
For this program, only the charge current needs to be set. In “Aut” mode, you
need to set the upper limit charge current to avoid too high of charge current
that may damage the battery. Some batteries of low impedance and small
capacity can lead to the higher charge current by the processor at the automatic
charge mod. In “Man” mode, it will charge the battery
with the charge current set by the user in the display
screen. Each mode can be switched by pressing the INC
and DEC button simultaneously when the current field is
blinking.
The screen shows the real-time progress during charge.
To stop charging press Batt Type/Stop button once.
[ 16 ]
DISCHARGING NICD/NIMH BATTERY
Set discharge current on the left and the final voltage
on the right. The discharge current ranges from 0.1-5A
and the final voltage ranges from 0.1-25V. To start the
process, press Start/Enter button more than 3 seconds.
Typical discharge voltage for NiCD/NiMH batteries is .9V
per cell. For 6 cell battery it is .9 x 6 = 5.4V final voltage.
The screen shows the real-time progress during
discharge. You can alter the discharge current by
pressing Start/Enter button during the process. Once you
change the current value with the INC or DEC button,
store it by pressing the Start/Enter button again. To stop
discharging, press Batt type/Stop button once.
CYCLING NICD/NIMH BATTERIES
This program can be used to charge then discharge, or
discharge and then charge NiCD/NiMH batteries. Set
the sequence on the left and the number of cycles on the
right. You can use this function for balancing, refreshing
or breaking in a battery. To avoid excess heat build up in
the battery during each charge or discharge sequence,
there is a “waste time” that can be set in the User Set
program menu, which is a brief cool off period. Cycle
sequences can range from 1-5.
To stop the process, press Batt type/Stop button once.
You can alter the discharge or charge current by
pressing Start/Enter button once during the process,
using the INC or DEC to change the setting, and the
Start/Enter button to save the setting. An audible alarm
will sound indicating the end of the cycle sequence.
At the end of the process you can view the charged or
discharged capacity of the battery. Press the INC or DEC
button and the screen will display the results of each
cycle.
[ 17 ]
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PB (LEAD ACID) BATTERY
This program is for charging Pb (lead acid) batteries with a nominal voltage
from 2-24V. Pb batteries are totally different from NiCD or NiMH batteries.
They can only deliver relatively low current compared to their capacity, and
similar restrictions apply to charging. The optimal charge current will be 1/10
of the capacity. Pb batteries must not be charged rapidly. Always follow the
instructions supplied by the battery manufacturer.
Change the parameters of charging by pressing the Start/Enter button to make
it flash. Then change the value with the INC or DEC button. The value will be
stored by pressing Start/Enter button once.
Set up the charge current on the left and the nominal
voltage of the battery on the right. The charge current
ranges from 0.1-10.0A. The voltage should match the
battery being charged. Start the charge process by
pressing Start/Enter button for more than 3 seconds.
The screen shows the real-time progress during charge.
To stop charging, press Batt Type/Stop button once.
DISCHARGING PB BATTERY
Set discharge current on the left and the final voltage on
the right. The discharge current ranges from 0.1-5.0A. To
start the process, press Start/Enter button for more than
3 seconds.
The screen shows the real-time progress during
discharge. You can alter the discharge current by
pressing Start/Enter button once during the process
using the INC or DEC to change the setting, and the Start/
Enter button to save the setting.
[ 18 ]
BATTERY INTERNAL RESISTANCE TEST MENU
This function allows the user to check the internal resistance of lithium batteries.
This is helpful as it allows the user to track the health of the battery by checking
for increased pack resistance as the battery ages. Attach the cell balance block
to the balance plug on the battery, and the main pack leads to the charger for
this test.
Interface of the Internal Resistance Testing.
Press Start/Enter button to start the test.
Displays individual cell Internal Resistance (IR).
Press INC button to view total battery pack IR. Pressing
INC again will return to the individual cell IR.
[ 19 ]
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SAVE DATA PROGRAM
This data storage feature allows the user to store, and load battery profiles for
frequently used batteries instead of always reprogramming the charger. This
feature will store up to 5 different battery profiles. To set up the parameter value
in the program, press Start/Enter button to make it blink, then change the value
with the INC or DEC button.
The profile value set in the profile screen does not affect
the charge or discharge process. They only represent the
specifications of the battery. The following screens will
automatically be displayed exactly matched to the battery
type you set up. The example shows a NiMH battery, 12
cells, and 3000mAh capacity.
Set up the charge current for manual charge mode, or
current limit for automatic charge mode. Each mode
can be switched by pressing the INC and DEC button
simultaneously when the current field is flashing.
Set up discharge current and final voltage.
Setting the cycle type, and the number of cycles.
Press the Start/Enter button for more than 3 seconds to
save the profile. The above process is similar for LiXX and
Pb Batteries.
[ 20 ]
LOAD DATA
This program recalls the data profile that was saved in the “Save Data” program.
To load the profile, press Start/Enter button once to make the profile number flash
and select the profile number using the INC or DEC button, then pressing the Start/
Enter button for more than 3 seconds.
Program Select
Select the Battery profile number to be loaded.
Loading the data.
ALTERNATE CHARGE SCREENS
There are several alternate screens that can be viewed during the charge and
discharge process. Pressing the DEC button will show the user input settings. Individual
cell voltage can be viewed by pressing the INC button during LiXX balancing operations.
Final Voltage when charging is complete.
Capacity cut-off function is turned On and capacity value
displayed.
Safety timer function is turned On and time value displayed.
Temperature cut-off function is turned Off and the temperature
value displayed.
Internal temperature of the charger, and external temperature
of the battery displayed. (External temperature is only be
displayed when using the external temp probe).
Present input voltage to charger. This is useful when charger is
attached to 12V battery to avoid discharging it too far.
Using the cell balance block with Lithium batteries you can view
the individual cell voltage in the pack. To use this, you must
have the cell balance block attached to the battery pack.
[ 21 ]
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[ stronghold]
WARNING AND ERROR MESSAGES
The Venom Stronghold 25 amp DC Multi-Charger incorporates several protective
and monitoring systems to verify function and the state of electronics and
batteries. In case of an error occurring, the screen will display the error and emit
an audible alarm.
Incorrect polarity of battery to be charged/discharged.
Battery connection is interrupted. Check charge cables
and connectors.
Short circuit of the output.
Input voltage wrong.
Voltage of the battery pack has been set incorrectly.
Charger has malfunctioned. Contact Venom Customer
Service at 1-800-705-0620 (208-762-0620 outside USA) or
customerservice@venom-group.com
Battery voltage is lower than voltage programmed. Check
the number of cells in the battery and confirm.
[ 22 ]
WARNING AND ERROR MESSAGES (CONTINUED)
Battery voltage is higher than voltage programmed for a
Lithium battery. Check the number of cells in the battery
and confirm.
Voltage of one cell in a lithium pack is too low. Check
each cell to find the low cell.
Voltage of one cell in a lithium pack is too high. Check
each cell to find the high cell.
There is a bad connection to the battery. Check connector
condition and cables carefully.
Internal temperature of the charger is too high. Stop any
processes and let the unit cool down.
Processor cannot control the feeding current. Unit
will need repair. Contact Venom Customer Service
at 1-800-705-0620 (208-762-0620 outside USA) or
customerservice@venom-group.com
Battery balance connector is not attached to the cell
balance block, or not attached correctly.
[ 23 ]
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[ stronghold]
COMMONLY USED TERMS
Final charge voltage
The voltage at which the battery’s charge limit (capacity limit) is reached. The charge process
switches from a high current to a low maintenance rate (trickle charge) at this point. From this
point on, further high current charging would cause overheating and eventual terminal damage
to the pack.
Final discharge voltage
The voltage at which the battery’s discharge limit is reached. The chemical composition of
the battery determines the level of this voltage. Below this voltage the battery enters the
deep discharge zone. Individual cells within the pack may become reverse polarized in this
condition, and this can cause permanent damage.
A, mA
Unit of measurement relating to charge or discharge current. 1000 mA = 1 A
(A=Ampere,mA=Milliampere).
Ah, mAh
Unit of measurement for the capacity of a battery (Amperes x time unit; h = hour). If a pack is
charged for one hour at a current of 2 A, it has been fed 2 Ah of energy. It receives the same
quantity of charge (2 Ah) if it is charged for 4 hours at 0.5 A, or 15 minutes (=1/4 h) at 8 A.
‘C’-rating
Capacity is also referred to as the ‘C’ rating. Some battery suppliers recommend charge and
discharge currents based on the battery ‘C’ rating. A battery’s ‘1C’ current is the same number
as the battery’s rated capacity number, but noted in mA or amps. A 600mAh battery has a 1C
current value of 600mA, and a 3C current value of (3 x 600mA) 1800mA or 1.8A. The 1C current
value for a 3200mAh battery would be 3200mA (3.2A).
Nominal voltage(V)
The nominal voltage of the battery pack can be determined as follows;
- NiCD or NiMH: multiply the total number of cells in the pack by 1.2. A 8-cell pack will have a
nominal voltage of 9.6 volts (8x1.2).
- LiPO: multiply the total number of cells in the pack by 3.7. A 3-cell LiPO wired in series will
have a nominal voltage of 11.1 volts (3x3.7).
- LiIo: multiply the total number of cells in the pack by 3.6. A 2-cell LiIo wired in series will have
a nominal voltage of 7.2 volts (2x3.6).
- LiFe: multiply the total number of cells in the pack by 3.3. A 4-cell LiFe wired in series will have
a nominal voltage of 13.2 volts (4x3.3).
If the nominal voltage of the battery is not printed on the battery’s label, consult your battery
manufacturer or supplier. Do not guess the rated voltage of the battery.
[ 24 ]
GENERAL WARRANYT POLICIES
Venom™ warrants this product to be free of material and workmanship defects when new. Venom™ will at its
sole discretion repair or replace defective components free of charge within 90 days from date of purchase
or within 30 days for all electronic components. This warranty does not cover wear and tear, crash damage,
modifications, failure to perform routine maintenance, or any damages arising as a result of improper use. All
warranty claims are to be directed to Venom™ Customer Service at 1-800-705-0620 (208-762-0620) or
customerservice@venom-group.com.
Important Notice
Venom™ assumes sole responsibility for our products; therefore, dealers should not be involved in any
warranty issues. All warranty claims are to be directed to Venom™ Customer Service. Before returning
any defective product, please contact Venom™ Customer Service at 800-705-0620 (208-762-0620) or
customerservice@venom-group.com to receive a Return Merchandise Authorization Number. A dated &
itemized sales receipt must accompany any product returned for warranty work.
RELEASE OF LIABILITY
Venom™, It’s affiliates, manufacturers, distributors, or retail partners shall not be held liable for any accident,
injury to persons, or damage to property resulting from use, misuse, or abuse of any Venom™ product. In
purchasing a Venom™ product the user agrees to accept responsibility for all such risks.
GUARANTEE
All products are inspected and adjusted individually before leaving the manufacturer and are guaranteed to be
free of material defects and manufacturing faults.
Notice of Rights
All rights reserved. No part of this manual may be reproduced or transmitted in any form by any means,
electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of
Venom™. For information on getting permission for reprints and excerpts, contact customerservice@venomgroup.com.
Notice of Liability
The information in this manual is distributed on an “As Is” basis, without warranty. While every precaution
has been taken in the preparation of the manual, Venom™ does not have any liability to any person or entity
with respect to any loss or damage caused or alleged to be caused directly or indirectly by the information
contained in this manual or by the products described in it.
Charging and discharging batteries has the potential for serious injury to persons and damage to property. In
purchasing this product, the user agrees to accept responsibility for all such risks, and will not hold Venom™,
it’s affiliates, manufacturers, distributors, or retail partners responsible for any accident, injury to persons, or
damage to property resulting from the use of this product.
This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their safety.
This product may contain sharp edges or objects that can cause cuts or other bodily injury. To prevent cuts or
other bodily injury, do not contact sharp edges or objects.
This product contains chemicals known to the State of California to cause Cancer, Birth Defects and other
Reproductive Harm. Be responsible, dispose of properly.
Actual product may vary from product shown.
[ 25 ]
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[ stronghold]
NOTES
[ 26 ]
[ s t ro n g h old ]
25 A M P
VENOM GROUP INTERNATIONAL
14028 N. Ohio Street
Rathdrum, Idaho 83858 USA
AUSTRALIA
PO Box 7325
Alexandria, NSW 2015
CUSTOMER SERVICE
800.705.0620
208.762.0620 (Outside USA)
customerservice@venom-group.com
/venomgroup
0667
/Venom_RC
/venomgroup
/venomgroupintl
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