CHEERSON 3.7V 800mAh Lipo Battery 25C for SYMA X5SW X5C-1 X5SC CX30W RC Quadcopter ( 5PCS ) + 5 in 1 Charger Great battery for Syma X5SW X5SW-1 X5SW-V3 X5SC X5SC-1,Cheerson CX30W RC Quadcopter. Upgraded 800mah high capacity,1 USB charger,charge 5 batteries at a time. Guarantee 7-8 min flight time(test by customer) ,high drain lithium-polymer rechargeable battery Integrated protect circuit:anti-shortcircuit,overcharge,overcurrent,overload protect. Led lights blink or turn off occurs to nearly full charged batteries.