charging time Message #7 Posted by Ellis Easley on 27 Apr 2002, 5:33 p.m., in response to message #6 by David Smith
I'm curious about this statement:
"To assure maximum battery life, you may not want to charge them for more than 10 hours or so."
I have no experience with NiMH cells but I've noticed that for regular NiCads, standard charge is usually defined as C/10 for 15 hours. If I followed your post correctly, the 10 hour recommendation referred to 150 mAH cells at 15 mA. Are NiMH cells different from standard NiCads in this regard? If the extra 50% charging at the C/10 standard rate is good for full capacity and battery life, would charging for less than 15 hours constitute undercharging? If so, would it lead to the "memory effect" (which I understand has been de-bunked) or just reduced capacity per charge? In general, is the important thing for long life and full capacity to make sure you don't recharge till the cells are quite discharged (down to 1V or less), always making sure to avoid reverse charging in multi-cell strings?
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