I have a Phantom that I got in April 2014. It uses the 11.1v 2200 ma battery. When I bought the quad from Bh photo, it came with 1 dji battery and 1 free Watson battery with same specs. If I remember correctly I could get around 12 min with a bare Phantom 1. Now with the oem battery, the times have dropped to about 8 minutes. I don't record the amount of flights on a particular battery. Do they just loose their punch which I'm sure they do. At what point do you just retire a battery. I have my batteries numbered as I have bought 3 more dji batteries after I had the quad for a short time. I have a battery checker thing that gives total voltage of pack, voltage of each cell, and power left in percentage. It's called a Capacity Controller. Anyway, when I check each cell, they vary much in percentage. If I have had a fully charged pack laying around for a week and not use, I will do a discharge with a TB6b charger, then do a storage charge. I will charge it up to full if I plan to fly soon. What else can I do. I'm not going to sleep with these batteries. I like to think I have more in life to do.