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How to store a rechargeable batteries

17 February 2010 2 Comments


Different kind of rechargeable battery chemistry requires different kind of storage procedures so that the batteries do not get damaged when they are stored.

In case of NiCD rechargeable batteries it’s advisable to discharge them completely if you want to store them, the quickest way to damage a NiCD batteries is by leaving them on a charger for extended periods of time (being topped) or storing them in a charged state.

In the case of NiMH batteries the best way to store them its to partially charge them around 30 – 35% before storing them, then use a charge / discharge cycle on then every 3 months to keep the batteries vibrant, also its a very bad idea to keep NiMH rechargeable batteries plugged on a charger for extended periods even if your charger has a trickle charge mode, as extended amount of trickle charger for days / weeks will damage a NiMH battery and thus reduce its serviceable life considerably, this is even more important for LSD NiMH batteries.

Remember if you store NiCD and NiMH rechargeable batteries for extended periods of time these batteries will take a couple of  recharge cycles (3 – 4) before they regain their full capacity, a conditioning cycle is a good idea after extended storage.

It is also important to store batteries in a cool and dry environment a temperature around  20 degrees Centigrade is ideal, some people also store batteries in an refrigerator its not necessary but if do that make sure you seal them in a zip lock so they are dry and no moisture is present and before charging the battery let it come to room temperature before charging.

For Li-ion batteries its best to charge them around 40% before storing them, also Li-ion batteries lose very little charge while they are stored.

2 Comments »

  • Edmund Doran said:

    Great information; thank you.

    The upshot for many people may be that with our lives filled with so much “stuff” and so much information and so many things to know and to keep track of, current rechargeable battery technology is simply too much trouble.

    As wasteful as they may seem, I, and I believe many other consumers, are going to stick with non-rechargeable alkaline (and, for a few select purposes, non-rechargeable lithium) batteries. They both promise and deliver unmatched reliability.

    I am disgustingly amazed that in the year 2012, battery manufacturers, despite touting their so-called “achievements” haven’t come nearly far enough. Every decade or so they come up with merely incremental improvements. Not to be be a conspiracy theorist, but, frankly, what incentive do battery manufacturers have to come up with true leaps and bounds in their crappy, old technology? They’re in business to sell as many batteries as possible, not to provide rechargeable solutions that would enable consumers to buy ~less~ batteries. (Perhaps we need a non-profit company to come up with a genuinely better battery?) It’s very depressing.

  • Jeff said:

    Psst Edmund:

    You are absolutely right that battery companies have no incentive to make good rechargeable batteries. Many off-brand rechargeables actually work better than name brands- Sanyo batteries are popular with their performance, and I have had better luck with Rayovac rechargeables compared to Energizer and Duracell.

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