Specification for charger: MODEL: SCH501F 2 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 Red and Blue alternatively alarming?lkaline and defective battery End of charge detection: -Delta V, 0 Delta V, Temperature termination, Timer, Charging current: AA X2 1000mA AA X4 500 mA; AAA X2 500mA AAA X4 250 mA Battery Rescue function: Yes-Unique function(blinking impulse) to rescue or revive old infrequent used NI-MH batteries Charging Time( For Reference): Battery type 1-2PCS(times) 3-4PCS(times) AA Ni-MH 2300 mAh 130 mins 270mins AA Ni-MH 2000 mAh 120mins 240mins AAA Ni-MH 850 mAh 80mins 160mins