BL-5L Extended 3800mAh 7.4V Li-ion Battery for Baofeng UV 5R Radio This BL-5L 3800mAh 7.4V extended Li-ion battery is specially designed for Baofeng UV-5R and Pofung UV-5R radio. Battery type: Li-ion battery. Voltage: 7.4V. Weight: approx. 140g. 100% Brand new.