This is the 1S 3.7V 65mAh LiPo Battery for the Überlite 2-in-1 Feather-light Flyer. FEATURES: Charges through USB port in transmitter INCLUDES: 1S 3.7V 65mAh LiPo Battery REQUIRES: USB LiPo Battery Charger, FLZA6155, not compatible with any other charger DIMENSIONS: jxs 10/04/11 Length: 19mm (.74") ir/jxs Width: 15mm (.59") UP GX 6/27/12 Height: 6mm (.23") Weight: Less than 5g (.17oz.)