For professionals on the road using Makita LXT and compact Li-Ion cordless power tools, Makita's optimum automotive charger has one of the fastest charge times (60 minutes) in the power tool industry. The DC18SE plugs into any standard 12V outlet found in trucks and other portable power supplies. It communicates with a Makita Li-Ion batterys built-in chip throughout the charging process to optimize battery life by actively controlling current, voltage, and temperature. Makita's unique forced air cooling fan helps control the core temperature of the battery. It is ENERGY STAR rated for meeting the strict energy-efficient guidelines set by the US Environmental Protection Agency (EPA) and US Department of Energy (DoE). The DC18SE charges Makita 18V Lithium-Ion batteries including the BL1830 and the BL1815.