Ansmann 10-bay 9V professional grade battery charger + 10 pcs of Ansmann 9V 300 mah Smart, desktop 9V battery charger designed for the demands of pro-audio -video applications. Charges 1-10 NiMH 9V (8.4V) batteries. LED's guide you with the charging process: Solid red - charging, Solid green - charged and switched to trickle charge, Blinking red - defective battery. Over charge protection, battery maintenance mode, defective battery warning, Lower charge current (75 mA) yields more recycles of your Ansmann batteries. To maintain battery integrity, charge current must be under 85 mA. Other chargers charge at a higher current and subject the battery to additional heat, resulting is less recycles and shortened battery life.