Samsung Digimax I-Pack CR-V3 Rechargable Li-ion Battery Hi capacity lithium ion battery cell Substitute for AA alkaline, AA Ni-MH and Li-ion Constant voltage no voltage drom like AA Ni-MH, alkaline & lithium. Memory effect free. Long cycle life ove 80% of capacity after recharhing 300 times. 120 min. quick charge. SMPS AC adapter over heat and over charge protection circuit.