Past weekend our M210RTK V2 was flying a surveillance mission. At about 61 percent battery left suddenly a message appeared saying battery must be replaced because of low voltage. Immediately after this message a new message appeared “critically low battery - landing” I managed to bring the bird safely down to the landing spot because I had enough altitude and was close to the landing zone. Second time this happens with the same battery’s as the first time. These battery’s have 28 cycles. Two years old.
First identical situation happened about a year ago. Battery’s did fine between first and second failure. Guess we will have to take this battery set out of service.
Log of first failure was sent to dji. They didn’t find any problems with the set of battery’s. Anyone had similar problems?

First message was “insert additional battery’s”