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On Thu, 13 Apr 1995, Kris D. Williams wrote: > Life span is more a function of charge/discharge cycles. Most NiMh > batteries have an average charge/discharge life of 350-500 cycles. Train it > well and you should get several years out of it. Train it poorly and you'll > buy a new in no time. > > IMHO you should follow the rule: Never charge your battery until it is fully > discharged and never stop charging it until it is fully charged. If you're > 'in-between' the charge, and are going from battery to AC, either turn off > the charge circuit (and continue to run on battery), run the discharge > cycle, or remove the battery to prevent the charge cycle from starting again. Does it follow that if I adhere to the rule and run the charge/discharge cycle, on average, once a day, the NiMh battery will last only 1-1.5 yrs ? With the limited total charge/discharge cycles does it also mean that it is better to keep the battery fully charged, operate the TP on AC power whenever possible, and maybe discharge once a week ? ( to avoid paying for a new battery every year which costs over US$200) Your opinions much appreciated. Weng