Geamazon 2pcs JXD509G 509W Quadcopter 850mAh lithium battery with charging protection board

These fit perfectly in the JXD 509G and provide almost 50% more flight time. They were worth waiting three weeks for. I'm not sure what the "charging board" is. I didn't find one in my shipment.

These actually last less time than the original battery that came with the JXD509G, yet they are larger and heavier. I wish I could find more of the OEM battery.

Good buy