Freezing rechargeable batteries

Discussion in 'Miscellaneous Equipment' started by lightwisps, Jul 17, 2013.

  1. lightwisps

    lightwisps Subscriber

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    Does anyone have any ideas about freezing rechargeable batteries that are freshly recharged? I now have a couple extra left over from a purchase yesterday and I charged all of them up because recharging them takes so long. Would freezing them be a good idea? Thanks Don
     
  2. Ian Grant

    Ian Grant Subscriber

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    Get a better charger, mine charges in a couple of hours. I also have a lead to charge from a car cigarette lighter, and a separate adapter to give me 240V AC from the cigarette lighter for other chargers etc.

    I store at normal temperatures.

    Ian
     
  3. Rick A

    Rick A Subscriber

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    Hmm... I always thought that freezing batteries drained the energy from them. My batteries die in the winter in the cold.
     
  4. Sirius Glass

    Sirius Glass Subscriber

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    The battery experts that I have worked with over many years told me that freezing or refrigerating batteries was not productive. Freezing some batteries damages them.
     
  5. L Gebhardt

    L Gebhardt Subscriber

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    If you are using the newer NiMH slow discharge batteries like the Enloops they will last a long time without freezing them. They also survive freezing just fine (at least down into the -15C range). If they are the original NiMH batteries (no claims of year long storage) nothing I have seen will keep them from being self discharged in a month or two.

    I have switched over to Enloops entirely. I use them in trail cameras in the Winter and they last fairly well, and definitely survive and function in cold weather.
     
  6. Hexavalent

    Hexavalent Subscriber

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    Freezing a Li ion battery that isn't designed to withstand freezing is not a good idea.
    Refrigeration *might* prolong charge keeping.
    Do not put a very cold, or frozen battery in a charger, particularly a "rapid charger".
     
  7. polyglot

    polyglot Member

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    Do not freeze batteries, it won't help and there's a good chance you will destroy them.

    If these are AA/AAA batteries, buy Eneloops because they basically don't self-discharge.

    Make sure you have a proper delta-V charger that shuts off when the battery is full (the voltage actually drops a couple mV), not just a cheap timer-based charger. Anything else and you will be damaging cells through overcharging.
     
  8. Gerald C Koch

    Gerald C Koch Member

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    Lithium rechargeables are preferable to those based on nickel. They hold their charge longer and are not subject to "memory problems." Freezing batteries is never a good idea. As far as refrigeration is concerned it is helpful with the older carbon-zinc batteries but not any other type.
     
  9. Poisson Du Jour

    Poisson Du Jour Member

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    Never heard of such an idea. Very cold conditions would reduce the performance of fully-charged/in-use batteries so I don't know what storage in a freezer would do to them.
    If cold performance is a worry, switch to lithium batteries.
     
  10. lightwisps

    lightwisps Subscriber

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    Thanks for all the great advice, they are now living happily at room temperature. Don