After flying my P2V+ for several months, probably over 200 flights without a single incident, I have my first battery failure. I thought I would share the experience. My issue started after a long GS waypoint flight I was in the process of landing and had 55% remaining battery however, while coming down from altitude I suddenly got the battery alarm. As I brought it down I noticed it was coming down on its own so it was doing the whole emergency landing thing. I was able to keep the left stick fully up and maneuver it to my landing spot without issue. I checked the battery gauge again and it still said 45% once I had landed. Hmm, why did it emergency land I thought. I put another battery in and made another long flight without issue. I recharged my batteries and today tried the same battery that failed me the day before. At take off it said it was 95% but once I got about 100 feet I got another battery alarm. this time I looked and it indicated it was at 30%, only moments after taking off? I quickly landed and after landing the gas gauge showed 75%? So it appears the issue was under heavy load the voltage dipped. Feeling the pack it does feel a bit swollen so I imagine one cell is bad. I'm glad this didn't happen when I was 2 miles down range or over a lake. Pretty spooky nonetheless. I don't think I'll try that battery again. Time to order another. You would think you would get more than 100-200 flights out of a battery but I have certainly had LiPo cells fail in other models before with similar indications. Does anyone know how long DJI will warranty batteries for?