The 18 Volts 6 Amp-hours Lithium-Ion battery guarantees longer runtime for greater performance and productivity. The battery procure protection against over-heating, overload and high discharge. Battery ensures double the runtime of 3 Amp-hours battery, maintaining the same size and weight. It is suitable for use with DC18RA, DC18RC as well as DC18RD chargers. It consists of a LED battery capacity indicator certifying optimum usage. Battery reaches full charge in just 55 minutes.This battery works with all 18 Volts Lithium-Ion tools that holds a star symbol on the connector plate or a yellow connector plate with a star or have a yellow connector plate only. It delivers consistent power and run time in extreme temperatures, even in winter that is below -20 deg C. Impact-resistant outer case and shock-absorbing inner-liner offers immense protection to battery. It has 16 contact terminals to maintain a constant connection with the tool, thus avoiding power loss or fluctuation.