charger Features: 1) Worldwide usage auto AC power adjustable from 100 to 240V 2) Smart, built-in microprocessor automatically switches off when batteries are fully charged 3) Safe, built-in IC provides various protections: thermal protection, overcharge protection, short-circuit protection, mechanical and electrical protection against reversal polarity, and auto defective battery identification 4) Convenient, 12V car cigarette lighter plug for on the road charging 5) Compact (2.5 x 4 x 1"), lightweight (5oz. only), including charger and all accessories 6) Charges 1 to 2 RCR123A from 1.5 hours to 3 hours 7) Peak voltage of 3.0V Li-ion will be 3.60V after fully charged