P2V less than a year old, along with 2 new DJI batteries at purchase. Flown moderately, maybe twice a month. Just started reporting low battery to the app even though showing 85%+ charge level (Klaxon goes off). P2V goes into emergency landing process as if battery is dangerously low. Lights on battery show full charge though ... appears accurate. Tried cycling both batteries, problem persists ... both batteries. Only thing out of ordinary here is batteries had sat idle for about 5 weeks previous during a span of time I wasn't able to fly due to a variety of distractions. Any suggestions ?