All batteries must be shipped with a ground shipping method.
Gaoneng GNB 850mAh 4S 14.8V Lipo Battery
Voltage: 4S / 14.8V
Discharge: 80C Constant, 160C Burst
Discharge Plug: XT30 Plug
good size for 2.5 to 3 inch drone builds
Haven't used them for too long but the performance seems good. They are cheap too.