FeaturesCharges 4 x AA / AAA / C / D batteries or 2 x 9V batteriesThermal cut off to prevent overchargingBuilt-in battery tester and discharge functionLED battery status functionTimer controlThe Infapower Fast Universal Charger with Battery Tester will charge 1-4 batteries simultaneously, either AAA, AA, C, D or 2 x 9v size batteries. It has a built-in battery tester and discharge function. Features Include: Timer Control set by user, Thermal cut off to prevent overcharging and LED battery status function. Will charge any brand of rechargeable batteries.Charging TimesAAA 550 mAh: 3 hoursAAA 650 mAh: 3 hours AAA 1000 mAh: 3 hours AA 600 mAh: 3 hours AA 1300 mAh: 6 hoursAA 2500 mAh: 9 hours C 2500 mAh: 9 hours D 2500 mAh: 9 hours 9v 160 mAh: 12 hours 9v 200 mAh: 15 hours