Aukru 4-IN-1 X4 1 Battery Charger charging box + charger for Hubsan X4 Quadrocopter H107 WLtoys UDI JXD Syma (Electronics)
Unfortunately, I have always the problem that does not hold the plug of the battery, it is difficult to connect at all 4 pieces without which lose again the same connection. Otherwise, if you got it right, it works.