Specification for charger: MODEL SCH308F 30 minutes charger Charging current AA X4 4000mA AAAX4 1500mA Input 100V-240V 50/60Hz DC12V Input form desktop.universal plug and car charger 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 Detection -Delta V,0 Delta V ,Temperature termination, Timer, Battery Rescue function Yes-Unique function(blinking impulse) to rescue or revive old infrequent used NI-MH batteries Charging Time( For Reference) Battery type Battery capacity Charging Time AA Ni-MH 2000 mAh 40min AA Ni-MH 2300 mAh 45min AAA Ni-MH 800 mAh 35min