Unless you susupect the battery meter is inaccurate and needs calibrating I would say it's time to charge now. No need to wait. You'll keep your battery healthy if you charge it when it comes down to around 70%.
Avoid deep discharge except maybe a couple of time/year (if that) to recalibrate you battery meter.
Last edited by Asawi; 04-27-2012 at 03:17 AM.
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