I found the following write up interesting and felt it was worth sharing, if of interest to you... http://www.rchelicopterfun.com/rc-lipo-batteries.html And then there's DJI's Smart battery (Phantom 2) care recommendations, if you haven't read them: http://wiki.dji.com/en/index.php/Phantom_2_Vision+_Preparing_the_Battery My search originally was addressing Li-Po batteries and expected life. I'm starting to experience 14 minute flight times, 18 minutes was the normal two months ago and prior. Have no clue as to cycle count or battery life % at the moment, but will pay better attention into the future. Edit to add: I have about +70% battery life left on three batteries. Strange that one of the original batteries is showing +80% life, whereas a newer one is showing +70%.