I recently had to buy M2P batteries and decided to buy used instead of off-brand. I bought on ebay, where prices were about half the cost of a new one, and asked the owner whether there was any swelling at all. He replied no, and I got the...
If you have a corrupt sheriff, be very careful of using illegal methods. I like the bright spotlight option for that reason. Maybe even a couple of high-powered flashlights could work if this guy is flying so low.
I've had the same issue with the phone when flying in hot Utah weather, but my current problem is that all six of my M2P batteries are showing slight (some more than slight) swelling.
I'm dealing (again!) with swelling issues on my six M2P batteries, so finally decided to buy at least one new one. But the DJI store does not have any. After searching a number of places, I did find one on Amazon (the listing said 'only two...