Great question and solid answers, thanks. I'm a n00b and once it dawned on me that the the battery problems were the low v battery and not the hi v battery, I started feeling less concerned. This question "what about the big battery?" was the next question that popped into my mind. I notice this thread ended in Nov 2014 ... Are there any updates / comments / observations nearly a year later? I'm guessing no, since there are no new threads.