Hyperion G3 Cx 0250 Mah 1s 3.7v 25c/45c Pack for Blade Mcpx Heli Battery Pack Dimensions: 43 mm x 19 mm x 5.8 mm Battery Pack Weight 7.81 g/0.28 oz. Specs At A Glance: Battery Voltage: 3.7 V; Battery Capacity: 250 mah; Battery Dishcarge Wire Size: n/a; Battery Balance Connector: n/a ;Battery Discharge Wire Length: n/a Connector: PZ U-Micro Suggested Accessories: Hyperion EOS 0606i DC Charger, Hyperion EOS 0606i AC/DC Charger, Hyperion EOS 0615 Duo Charger, or Hyperion EOS 0720i AC/DC Charger, HP-UM6PADAPT (charge 6 U type packs at once using this parallel adapter plug)