FENIX ARB-L18-3500U  Micro USB Rechargeable Battery *** pricing is for one battery ***
The ARB-L18 3500U battery can be charged via its own USB port or with conventional charger. A protective circuit is built into the anode and covered with a riveted steel hat. The battery is fully covered with the steel shell, thus the potential risk of short circuiting caused by collision or impact is greatly reduced.
Micro USB charging port lets you charge the battery directly or in a charger
Protection circuit in the Anode to prevent short circuit
Multiple layers of protection
500 charge cycles can be expected from a properly maintained battery.
Fully covered with a riveted steel shell for impact resistance
Over charge, discharge, short circuit, and over heating protection