Suitable for 1 or 2pcs of AA/AAA Ni-MH batteries & 1 pc 9V Ni-MH battery. Rugged Able to withstand a drop from a height of 1metre. Reverse polarity protection The charger protects the charger & batteries from being damaged by incorrectly installed batteries. Over current protection Maintain a constant charging current during the charging cycle. Low battery leakage current If the battery charger is not connected to input power & the batteries are left in the charger, the charger will discharge the batteries using a pre-determined current. Charging indicators LED display Constant power charging feature The charger detects & monitors the battery voltage & changes its charging voltage to match ensuring it is always consistent with the battery characteristics, extending battery life. Charging Times AA Ni MH 2000m Ah = 12 Hours AA Ni MH 2300m Ah = 13 Hours AAA Ni MH 800m Ah = 12 Hours AAA Ni MH 900m Ah = 13.5 Hours 9V Ni MH 200m Ah = 12 Hours Electrical Performance Input Rated input voltage: AC 240V Frequency: 50 Hz Input power: P≤ 5.0W Standby power: <0.8W Charging current AA: 1 or 2pcs: 200m A ±30m A AAA: 1 or 2pcs: 80m A ±30m A 9V: 1pc: 20m A ±10m A Note: Constant voltage charging, OCV 1.2V or 9V Ni-MH battery testing Charging voltage AA/AAA: 1.4V DC x 2 9V: 9.8V DC x 1 Battery leakage current 5m A max Short circuit protection Io < 30m A