5pcs 3.7V 600mAh Lipo Battery JST Plug for Syma X1 WLtoys V929 V959 V222 Quadcopter Size: 58 x 19 x 7mm. Capacity: 600mah. 5 pieces. Compatible with syma x1, wltoys v929 v959 v222 and any other copters with the same volt and plug.