2 X WLtoys V930 V977 3.7V 520mAh 30C Upgraded Li-po Battery<br /><br /><br /><br />Descrition:<br /><br /> <br /> Item Name: 3.7V 520mAh Li-po Battery<br /><br /> Weight: About 13.2g<br /><br /> Size: 6.5x0.4x1.3 cm<br /><br /> Flying time:About 11 minutes(Manufacturer rated)<br /><br /> Usage:For Wltoys V977 V930 RC Helicopter<br /> <br /> Package Includes:<br /> <br /> 2x 3.7V 520mAh Li-po Battery