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jump to last post 1-5 of 5 discussions (5 posts)

What Can You Do With "Flat" AA batteries?

  1. eugbug profile image97
    eugbugposted 5 years ago

    What Can You Do With "Flat" AA batteries?

    Here's a tip on what you can do with AA batteries when they seemingly become flat. Often the circuitry in electronic gadgets indicates a battery is exhausted when the battery voltage is insufficient to run the device and supply it  with current. These batteries will be well able to run a battery clock though which only needs a tiny trickle of current. I have done this with several batteries and they lasted well over 6 months.

  2. CyberFreak profile image79
    CyberFreakposted 5 years ago

    You can also make  a Joule Thief circuit which will empty them completely, supposing you wanted to check their absolute emptiness limit. It can be quite fun.

  3. Distant Mind profile image77
    Distant Mindposted 5 years ago

    I guess you should dispose of them in a proper way since they are harmful to the environtment.

  4. leakeem profile image81
    leakeemposted 5 years ago

    Define "Flat?" Do you mean zero potential, 0 voltage or do you mean that the battery is below the gadget's cut-off voltage (around 0.9V)?

    From your description, I think you mean the latter but anyway, flat as in 0V, or dead alkaline and li-ion batteries cannot be recharged or reused. the best you can do with them is make small explosive.haha! dead nimh and nicd can still be recharged assuming the cells are not yet overly damaged.

    If the AA alkaline batteries are not yet dead, i.e. they still have a potential around 0.9V they can be recharged with the proper technique.

    I have a hub about that. it's here: … -Batteries

  5. Gaizy profile image84
    Gaizyposted 5 years ago

    You could try the experiment in this video -