Powerextra 2.5Ah 10.8V Replacement Battery Compatible with Bosch BAT411 10.8 Volt Lithium-Ion Battery Brand New | NI-MH| 10.8Volts | 2000mAh Bosch BAT411 Battery Charging at any time will have no effect on the battery. New Replacement Battery 10.8V 2.0Ah Li-ion ForBosch BAT411 ,Tested Good !! Cools the battery by forcing cool air through the battery's built-in air vents. Products come with our powerextra is 30 days money back,and 24 Hours friendly customer service!