Quote:
Originally Posted by rling
My understanding of the modern polymer batteries is to not it let go flat at all, as this will shorten its life considerably, and that the best way to maintain the battery is to charge once it drops below half. So, how do we calibrate the battery if we don't let it run flat?
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That is very true that overdischarging a Lithium battery will reduce it's capacity or completely ruin it. However, since the Pocket Pro battery is a 3 lead battery, it probably contains a battery controller chip that controls charge and discharge of the battery and also communicates battery information to the Pocket Pro microprocessor. In that case, the battery controller chip will prevent the battery from becoming overdischarged, and cause a device shutdown when it detects the battery voltage reaching the critical level. Lithium batteries without an embedded controller chip can definitely be overdischarged and ruined.