I have the Phantom 1 using stock 3s 2200 ma batteries. Since this question is for all the lipos, I put the question here. I have a cell checker that shows voltage of each cell and also percentage of power left for each cell. Fully charged the percentage on a 3cell may read 98 95 97 %. Ok so I go out and fly till I get the first battery warning. I recheck the battery. It may read 14 32 28 %. I don't get that. It's like the cells don't discharge at the same rate. Is this normal. New or older battery does the same. I don't understand the large difference between cells. Flying times are normal it seems.