Berkeley CSUA MOTD:Entry 29463
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2025/05/24 [General] UID:1000 Activity:popular
5/24    

2003/8/26-27 [Science/Battery] UID:29463 Activity:low
8/26    I just got a new NiMH battery for my thinkpad.  I'm going to use it
        occasionally, and I want it to last. Should I store it discharged or
        charged? I can't find anything on google or ibm. Thanks. -brett
        \_Return it and see if you can get a LiIon battery instead. NiMH
        is almost guarenteed to start failing within a year or two. If
        you want to keep it fresh you basically need to do a deep discharge/
        charge on it once it starts failing. I'm not quite sure if storing
        it away discharged will help the situation, as the batteries will
        degrade on their own over time. Storing it charged will not likely
        make much of a difference as the battery will lose voltage over time
        on their own, they actually will slowly leak electricty.
        The key thing is not to charge or discharge NiMH batteries in bursts,
        as they will have a memory effect.
        \_ I must be on crack, it IS Li-Ion, I don't know where I got the
           idea it was NiMH.  Thanks for the info and sorry about wasting
           your time. Ok, what about storing Li-Ion battery.   -brett
        \_ Re the memory effect, are you talking about NiMH or NiCd?
2025/05/24 [General] UID:1000 Activity:popular
5/24    

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