... :2000mAh,2200mAh,2400mAh,2600mAh 4000mAh,4400mAh,4800mAh,5200mAh Size:20x38x65mm 7.4V 2200mah (18650*2) Battery Pack Description: 1,Packing: ... . High quality 7.4V 2.2Ah Li-ion rechargeable battery Module is made of 2 PCS ... side in series . Wrapped by PVC tube 3,Voltage: 7.4V(working) 8.4V(peak) 5.5V(cut-off) ... : (LxWxH)65x 3 8 20mm Weight: 100g 18650 lithium ion battery pack