Amazon.com: Synergy Digital Camera Battery, Compatible with DJI RB2-2450mAh- 7.2V Digital Camera, (Li-ion, 7.4V, 2450mAh) Ultra High Capacity, Replacement for DJI RB2 Battery : Electronics
Protected Holder Case for 2S1P 7.2V 7.4V 18650 Li-ion Battery Charge/Discharge | eBay