The DeWALT FlexVolt 20/60 Volt battery with a capacity of 12.0 Amp-Hours changes its voltage level depending upon the tools used. This battery can be used with 60 Volt power tools, 120 Volt tools and also with 20 Volt tools and chargers. Three-LED light denotes the charging status of the battery. Lithium-Ion technology delivers optimum performance. This battery can also be used even up to 0 degree F temperature.