Rechargeable Alkaline Battery Technologies
Evolving Energy Pty Ltd
PO Box 1131
NSW 2482
0487 701 710
ACN 169 512 930
ABN 91 169 512 930
[email protected]
Rechargeable Alkaline Battery Technologies
A rechargeable alkaline battery (also known as alkaline rechargeable or rechargeable alkaline manganese (RAM))
is a type of alkaline battery that is capable of recharging for repeated use. The first-generation rechargeable alkaline
technology was developed by Battery Technologies Inc in Canada and licensed to Pure Energy, EnviroCell, Rayovac,
and Grandcell. Subsequent patent and advancements in technology have been introduced. The formats
include AAA, AA, C, D, and snap-on 9-volt batteries. Rechargeable alkaline batteries are manufactured fully charged
and have the ability to hold their charge for years, longer than NiCd and NiMH batteries, which self[1]
discharge. Rechargeable alkaline batteries can have a high recharging efficiency and have less environmental
impact than disposable cells.
Proper Use and Durability
Although these batteries can be used in any device that supports a standard size (AA, AAA, C, D, etc.), they are
formulated to last longest in periodical use items. This type of battery is better suited for use in low-drain devices such
as remote controls or for devices that are used periodically such as flashlights, television remote control handsets,
portable radios, etc. If they are discharged by less than 25%, they can be recharged for hundreds of cycles to about
1.42 V. If they are discharged by less than 50%, they can be almost fully recharged for a few dozen cycles, to about
1.32 V. After a deep discharge, they can be brought to their original high-capacity charge only after a few chargedischarge cycles.
Comparison to Other Rechargeable Batteries
The rechargeable alkaline battery is cheaper than other rechargeable types. Cells can be manufactured in the fully
charged state and retain capacity well. Their capacity is about 2/3 that of primary cells. They are of dry-cell
construction, completely sealed and not requiring maintenance. Cells have a limited cycle life, which is affected by
deep discharge; the first cycle gives the greatest capacity, and if deeply discharged a cell may only provide 20 cycles.
The available energy on each cycle decreases. Like primary alkaline cells, they have a relatively high internal
resistance, making them unsuitable for high discharge current (for example, discharging their full capacity in one
Chemical composition
Rechargeable alkaline batteries are developed from primary alkaline batteries, designed to resist leakage that a
recharge could cause, so they can be safely recharged many times.
Some other types of rechargeable cells contain mercury or cadmium and thus can be an environmental hazard unless
disposed of properly. As of August 2007, a number of companies make batteries that are free from these heavy
metals. According to the websites of EnviroCell and PureEnergy and according to old Rayovac packaging, these
manufacturers' rechargeable alkaline batteries have no mercury or cadmium.
David Linden, Thomas Reddy (ed.), "Handbook of Batteries Third Edition", McGraw Hill, 2002 ISBN 0-07-135978-8 chapter
36 Rechargeable zinc/alkaline/manganese dioxide batteries
"EnviroCell Alkaline Rechargeable Batteries". Retrieved 2010-10-15.
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