Review on Upgrade Your Two-Way Radio With High Capacity Baofeng Battery Pack BL5 - 2Pcs Set By Mirkit Radio USA Warranty by Agonia Ajdini

These Mirkit batteries are a little more expensive than "generic" ones. I couldn't find a label of Baofeng OR Mirkit on the battery itself, so take that for what it's worth. They appear to be the identical 2100mA battery that ships in Mirkit radio UV5R MKX3. I tested them by setting in frequency scan mode and letting it run. It ran for 5 hours and still showed 2/3 charge. I continued to let it scan overnight. Not sure exactly when the juice ran out, but I consider that a successful test and acceptable battery life. Especially since I did not charge them before beginning the scan. Both batteries still had a full charge upon arrival.