3.7V 400mAh 20C Lipo Battery for Walkera QR Ladybird V2 4#3B 4G6 4#6 LAMA2 CB100 This battery will fit in various types of RC Helicopters/RC planes. Please see the following specs to matches your own need. Fast Shipping From Texas Specs: Capacity: 400mAh Voltage: 3.7V Cell : 1 Discharge Rate : 20C Size : 36mm x 20mm x 8mm Weight : 10g Package Contents:  100% Brand New  1x 3.7V 400mAh 20C RC Lipo Battery