I recently bought a battery from ebay, it's labelled GiFi Power, the lights are the same as the dji battery. I know this is not an original battery as it only costs $94 as compared to an original dji battery at $249, Yes we pay a lot for our toys down under. Even when our dollar was worth more than the US dollar we still pay more, go figure. Anyway, there is advice of doom and gloom in forums about using not genuine batteries, but the only tale i can find that ended badly was with a genuine battery and a P2. So to be sure, I have been hovering my P3S until the battery runs out for quite a few times and the results are good. ie no dropout of the sky problems and the fly time is about the same as the genuine battery, Ok it's a little less but at less than half the price there has to be a trade off somewhere. I know this is an older thread but just wanted to weigh in with my experience with a non genuine batteries.
Oh and it fits in the ac just the same as the original battery.