I suspect this is the reason why two batteries in my P4 stopped working at the same time. By the way, DJI cannot guarantee that the battery will last 6 months as batteries seem to be volatile and always behave unpredictably. Update: After contacting DJI support I can draw some conclusions. 1) DJI is not a company I'm likely to do business with again. There seems to be a lot of issues with the P4's batteries and battery dock storage mode. I was planning to buy Mavic but I won't be dealing with…