UltraFire 16340 CR123a 800mAh 3.0V Rechargeable Li-Ion Battery (Pair) + Charger Combo Ultrafire Li-Ion Rechargeable CR123A 16340 with IC Protection (pair) Charges 1 or 2 batteries simultaneously Can be charged over 500 times Holds 85% charge over 12month period Compact travel charger can be taken anywhere