Genuine OEM BTECH (BaoFeng) BL-5L (BL-5 Series Li-ion Battery), genuine batteries include battery protections that protect your battery from over-charging, over-heating, short circuiting, and more.
Extended Long Life replacement battery for the UV-5R and BF-F8HP Series BaoFeng Radios
The BL-5L Extended battery, more then doubles the battery life of your UV-5R series radio, when compared to the stock BL-5 Battery. Average users can will be able to go 2 days without a charge; while light users can go a whole week without needing to charge your battery.
Not only does the BL-5L extend the battery life of your radio; but it also adds 1. 5" of length and 3 additional ounces when compared to the UV-5R with a stock BL-5 battery. This allows for a more solid feel in the hand when compared to using your radio with the stock BL-5 battery.
External Quick Charge Port, the BL-5L adds an external 7. 4V charging port to allow the battery to charge without requiring the use of a CH-5 charging base.