Jjrc Original Battery Jjrc H31 Spare Parts 3.7v 400mah 30c Battery H31 Lipo Battery 3.7 V 400ma For Jjrc H31 With Xh2.54 Plug - Parts & Accs - AliExpress
Upgraded version Lipo Battery 3.7v 400mAh 30C for JJRC H31 H43hw Drone Li Battery JJRC H31 Lipo Battery + 6 in 1 cable charger|Parts & Accessories| - AliExpress
4 Batteries 3.7V 450mAh & Charger 5 in 1 for Hubsan H107 / JJRC H31 H6C / Eachine E33 E33C / Wltoys U816A V252 / KY101 - Maison Du Drone