That's such an ironic thread title. Anyway, your humble newbie would like to ask, when I decide to calibrate my MB, or actually bring it outside to use where there's no way to recharge, would letting it's battery fully drain till the MB shuts down shorten it's lifespan? Or is it better to fully drain before recharging? I went through some threads here, and though it seems to be recommended that we allow the MB to run on it's battery once in awhile to 'caibrate', I'm not sure how far we have to drain it... Thanks in advance.