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Is it wise to let the battery run down periodically before charging?

Is it wise to let the battery run down periodically before giving it a full charge?
walt saito, March 2009
Most rechargable batteries can develop a memory so they expect a short discarge and then a full recharge so a once a month leave the item on untill it is nearly fully discharged then recharge it will help prolong the life of the batteries and make them deliver full power for longer

nigel, March 2009