I have read many reviews prior on this and the battery I received is Wonderful! No issues with size or wiring as others have commented. Fits perfect into the AR.Drone and is actually slightly smaller in width than stock battery and gets significantly longer flight time. It's great to have a battery that gets some real fly time. I play and enjoy my AR.Drone so much more with these batteries. Factory charger charges these nicely, but I do recommend an upgraded charger as well to charge faster. I find the battery fits into the Velcro strap easier than the stock battery. Another thing I noticed is it holds a charge MUCH longer than the factory issued battery. If you charge it today you can fly next week, but not with the stock battery. I fly a lot, so after trying this battery out and seeing it is definitely a great product, I ordered a few more and they work great with no issues. 3 or 4 batteries can give you a good 1 hour + of serious flight time. Enjoy!