On 29/7 i bought a new battery so i had 3 pieces. I did a range test yesterday to see how the bird would behave after i added a 10 turn helical ( home brewed, SWR 1.08 ) on the FPV side and that with NO booster. RC was on 100mW and i know i get +18000ft out of that. So i toke the new battery because the other 2 have more charges. I had the app om metric and after 2km it whent to N/A as expected. Switched to imperial and went to 8000ft and still excellent FPV with no boosters. I decided that it was more then enough so i set the remote off. It came back and when the battery was @ 45% the app sounded the low bat alarm. Strange but it was still some 2000ft away. It began decent and i could manage to bring it back switching back and forth to GPS and ATTI. On that moment when its almost home a police van pulled over blocking my LOS on the remote. I ignored them, they show up when you don't need them djee. So i could bring the bird home safe after some twitching stress moments, i even did a handcatch. As i suspected a faulty battery i charged it and it was charged in less time then usual. Take more then 1u15 right ? I guess it was charged after 45 min or so. Today i had that battery up as a first. On 90% the low battery sounded again and it began auto decent. It landed and it never lowered its charging percentage. Ones landed and motors still running the alarm stopped. Battery now on 85% i gave it a boost to let it hover. As soon i gave throttle the alarm sounded again. I hocked up the bird on the assistant and there is nothing irregular to see. I tried to fire it up but it doesn't do anything when its connected to a PC. I unplugged to fire up and to connect it on the PC because i suspect a faulty cel. It didn't show anything out of the ordinary, all 3 cell's on the same level of voltage. The battery still act suspicious and its not safe to fly with it. The other 2 battery's i have give a 14 min flight time with no issue's. My question: Would this battery be a case of warranty ?