Rechargeable battery life

Discussion in 'Digital Photography' started by Wilt W, Jun 7, 2004.

  1. Wilt W

    Wilt W Guest

    There has been a thread about NiMH self-discharge rate and someone's problem
    with very short period of battery life even sitting idle. Some doubt the
    claims of self -discharge that I have posted. Lest there be any further doubt
    about facts vs. urban legend, I quote from a manufacturer of rechargeable
    batteries:

    "Alkaline batteries stored at "room temperature" self discharge at a rate of
    less than two percent per year...At 85 degrees F they only lose about 5% per
    year, but at 100 degrees they lose 25% per year. ...
    NiMH and NiCd batteries self discharge at a MUCH faster rate than alkaline
    batteries. In fact, at "room temperature" (about 70 degrees F) NiMH and NiCD
    batteries will self discharge a few percent PER DAY. Storing them at lower
    temperatures will slow their self discharge rate dramatically. NiMH batteries
    stored at freezing will retain over 90% of their charge for full month. So it
    might make sense to store them in a freezer. If you do, it's best to bring them
    back to room temperature before using them. Even if you don't freeze your NiMH
    batteries after charging them, you should store them in a cool place to
    minimize their self discharge.

    The rate of self discharge for any battery depends on the temperature at which
    it's stored at. Stored at 70 degrees F (20 C) NiMH batteries will lose up to
    40% of their charge within a month. "

    --Wilt
     
    Wilt W, Jun 7, 2004
    #1
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  2. Wilt W

    Bill Turner Guest

    On 07 Jun 2004 04:50:53 GMT, (Wilt W) wrote:

    >I quote from a manufacturer of rechargeable
    >batteries:


    _________________________________________________________

    May I ask which manufacturer?

    --
    BT
     
    Bill Turner, Jun 7, 2004
    #2
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  3. Wilt W

    Wilt W Guest

    Wilt W, Jun 8, 2004
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