Spectralink 8020/8030 Li-Ion Battery Best Practices

Spectralink 8020/8030 Li-Ion Battery Best Practices
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This technical bulletin explains the Li-Ion battery storage requirements; technical specifications; and
provides tips to maximize useful life expectancy.
Note: These instructions also apply to OEM handsets manufactured by Spectralink that are based on
Spectralink 8020/8030 handsets
This technical bulletin applies to Spectralink 8020 and 8030 handsets and OEM derivatives.
Battery Pack Technical Specifications
Each Spectralink 8020 and 8030 battery pack utilizing advanced Lithium-ion (Liion) cell chemistry with the following performance specifications:
• Talk time - up to 4/6/8 hours (see Table 1)
• Standby time - up to 80/120/160 hours (see Table 1)
• Call server protocol, WLAN infrastructure; and Push-to-Talk will
reduce actual performance
• Some conditions which negatively affect performance: Talk time is
known to be reduced in a network environment with excessive jitter.
Standby time is known to be reduced if handsets experience frequent
reboots or frequent disconnections and reconnections to the wireless
network. If handsets are frequently rebooting for no apparent cause
or frequently displaying “No SVP Response” contact the designated
service organization to identify specific issue.
• Full charge time – 4/6/8 hours (see Table 1)
• When proper storage and charging practices are followed; the
battery pack is expected to have a service life of approximately 500
charge /discharge cycles. Spectralink strongly encourages customers
to replace battery packs every year (from the date code printing on
the battery label) or after 500 charge cycles
• Battery packs can be charged either in Spectralink 8020 and 8030; or
in the rear slot of a dual slot charger; or in a quad charger slot
• Charging the battery pack in the handset is possible powered off or
powered on in the “Standby” state. When charging, the handset will
present “Charging” status on the display
December2015|CS-09-17
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Battery Pack Storage & Inventory Management Recommendations
Spectralink would like to emphasize the optimum storage and handling
procedures for Battery Packs for the Spectralink 8020 and 8030.
Spectralink 8020 and 8030 handset battery packs continue to be produced
from the advanced Lithium-Ion (Li-Ion) cell chemistry designed to be resistance
to high temperatures; safely used in extreme environments; and deliver a long
service life provided optimal storage and charging practices are followed.
As with other rechargeable Li-Ion based products, Spectralink 8020 and 8030
battery packs should not be stored or kept idle for an extended period of time,
rather they should be cycled at regular intervals to ensure they maintain the
expected lifetime.
During sales channel distribution and prior to deployment at a customer site,
battery stock should be managed by shipping or using batteries with the oldest
date code first. Typically this is a FIFO (First In, First Out) process. This will help
ensure, on average, batteries do not sit on-the-shelf longer than necessary. It is
also recommended to maintain lean inventory levels to avoid holding batteries
for extended duration. If batteries are stored for an extended period of time,
periodic maintenance charges may be necessary.
This model battery pack storage recommendations are as follows:
• Battery packs must be fully charged using the appropriate
Spectralink battery charger before first use. Full charge time is
dependent on battery model (see Table 1)
• Battery packs should not be stored more than five months at room
temperature prior to use/sale
• If for some reason a battery pack is stored more than five months it
must have a periodic maintenance charge to maximize batteries useful
lifetime. The maintenance charge should bring the battery up to its full
capacity.
• In cases where battery packs are stored for an extended time
(greater than five months) the battery should return to almost
complete capacity after two to three charge/discharge cycles. The first
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battery pack charge after prolonged storage usually yields a lower
capacity than normal.
Battery Charge Cycles and Maximizing Useful Life Expectancy
Defining initial expectations for battery performance is straightforward
compared to quantifying a batteries total useful life expectancy. The defined
number of expected battery lifetime charge cycles can be used to approximate
end of useful life for a battery but is not a definitive number.
• End of useful life is defined as the point a battery no longer satisfies
a customer’s expectation for talk-time and/or stand-by time or when
battery is unable to accept any charge
• When approaching end of life total stand-by time will degrade
before total talk-time and batteries which are used regularly will likely
accept some charge long before they unable to accept any charge
• Some customers will have a higher tolerance for the reduced
performance near end of life which will extended the realized battery
end of life
• Battery performance degrades consistently until near end of life
when performance degrades sharply until battery will no longer
accept a charge
Spectralink 8020 and 8030 Lithium-Ion (Li-Ion) batteries will deliver
approximately 500 charge cycles before performance starts to degrade. For this
battery technology a single charge cycle is defined as each time a battery is
drained of approximately 80% of full charge capacity. The 80% or greater
discharge could occur in a single use or in multiple uses followed by a full
charge. Example: Battery is drained of 20% of capacity then charged four times;
the total of the four 20% discharges equals an 80% discharge – one charge
cycle.
To obtain the maximum service life from the Li-Ion batteries:
• Charge batteries after each use without regard to “Low Battery”
warning (Note: discharges to handset “low battery” message or full
discharges (to handset power off) do not reduce useful battery life
• Handsets should be powered off when not in use
• Powered on handsets should stay within the facility wireless
coverage area, handsets discharge batteries more quickly when the
wireless network is extremely weak; not stable; or is unavailable
• Extreme environment negatively affects battery life, specifically
extreme cold (below -5°F or - 20°C) and in extreme heat (greater than
158°F or 70°C)
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• Batteries do not suffer from the “memory effect” however fully
discharging batteries (until handsets power off) will reset the internal
chip which communicates battery charge information to the handset.
Result may mean slightly longer service life per charge cycle before
the “low battery” warning is displayed. Recommended full discharge,
until the “Low Battery” message on the handset, approximately every
30 days.
• After a period of non-use (more than a few days) batteries may
deliver slightly less than full performance for the first few charge
cycles. This fact is true for extended storage and for new out of the
box batteries.
Life Expectancy and Battery Management Strategies
If handsets no longer deliver talk or standby time that they used to, in almost
every case, batteries are past their useful life, and usually because customers
don’t recall how long the batteries have been in service. To help prevent this type
of dissatisfaction, customers can use a battery replacement or battery
management strategy.
Battery performance (e.g. talk-time and/or standby time) is clear indicator of
whether a battery is past its useful life. With a large number of handsets tracking
each battery’s performance can be tedious for an administrator and battery
management becomes a reactive process, making it harder to budget and manage
replacement inventory.
A proactive battery replacement program defines a duration that a customer
expects batteries to deliver acceptable performance based on usage and charge
patterns, e.g. lifespan of 12-18 months. Some customers will simply replace all
their batteries periodically based on this timeframe. Another approach, useful if
system expansion has occurred and batteries are not all of the same age, is to
write the date each battery first enters service on the battery label, and then
periodically review the batteries, replacing those batteries approaching end of the
expected life based on the planned lifespan. Alternatively customers can use the
printed date code on the label, rather than manually writing the date, but this is
not quite as accurate.
Locating the Battery Date Code
The date code on the battery label indicates the start date of the battery warranty,
not the manufacture date, and provides a rough indication of when a battery may
have entered service (assuming it was not stored unused for long period). During
battery manufacture the printed date code is set in advance of the current date to
accommodate typical transit delay as the battery passes through production and
distribution. The date code has an “XX/YY” format, where XX is the month, and
YY is the year. The battery label shown below has date code 04/12 i.e. April
2012. If there is any issue with a battery, Spectralink will typically ask for this
date-code to verify the battery is eligible for warranty replacement.
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Battery Management & Replacement Recommendations
With a large number of handsets, tracking each battery’s actual performance can be tedious for an administrator
and battery management becomes a reactive process, making it harder to budget and manage replacement
inventory. A better methodology is to plan periodic replacements (based on usage and charge patterns, e.g.
lifespan of 12-18 months) from when batteries entered service. The easiest approach is to replace all the batteries
periodically. But if system expansion has occurred and/or batteries are not all of the same age, another option is to
write the date each battery first enters service on the battery label, and then periodically review the batteries,
replacing those batteries approaching end of the expected life based on the planned lifespan.
Typically a battery will have experienced some delay through sales distribution before getting to the customer
however.
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©2015, Spectralink, Corp. All rights reserved.
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or transmitted in any form or by any means, for any purpose other than the recipient's personal use, without the
express written permission of Spectralink.
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While Spectralink uses reasonable efforts to include accurate and up-to-date information in this document,
Spectralink makes no warranties or representations as to its accuracy. Spectralink assumes no liability or
responsibility for any typographical or other errors or omissions in the content of this document.
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in this document for any purpose. Information is provided "as is" without warranty of any kind and is subject to
change without notice. The entire risk arising out of its use remains with the recipient. In no event shall Spectralink
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