Hi, I bought a Phantom 3 standard a few months ago and have just bought a second battery for it. When I plug the old battery in to charge from 25% (for example) it blinks the 1st light until it's charged to 50%, then it it blinks the 2 lights etc... The new battery however, when plugged in cycles through all 4 lights twice then starts blinking the 1st light like the other battery. It seems to charge fine and fly fine but I'm just wondering if it maybe has old firmware on it? I haven't seen any way to check the battery firmware or be able to update it through the app? Any ideas?