Fuel gauge tells you when battery is charge and has a good/bad battery indicator. 4 x AA, 4 x AAA. Charges batteries in pairs. Charge time 3 up to 5 hours. 240 minutes. Charging indicators. Bad cell detection. Automatic timer cut-off. Over-charge protection. Short circuit protection. Reverse polarity protection. Includes 4 x pre-charged 2000mAh AA batteries . Manufacturer’s 1 year guarantee. EAN: 7638900398380.