Specification for charger： MODEL SCH509F 3 HOURS charger Input 100V-240V 50/60Hz Input form desktop.universal plug LED indication status Red LED on?harging Blue LED on?ully charged and on trickle charging End of charge detection -Delta V,0 Delta V ,Temperature termination, Timer, Charging current AA/AAA X2 600mA AA/AAA X4 300 mA Charging Time( For Reference) Battery type 1-2PCS(times) 3-4PCS(times) AA Ni-MH 2300 mAh 4-5 h 8-9h AA Ni-MH 2000 mAh 3-4h 6-8h AAA Ni-MH 850 mAh 1-2h 2-3h