The dewalt de9135 multi chemistry charger is suitable for all dewalt 72 18 volt ni cd ni mhli ion batteries so users only need one charger for multiple cordless products diagnostics with led indicator communicates battery charge status charged charging power line problem replace pack and battery too hot or too cold it has a 3 stage charging system which provides maximum runtime and extends overall life of the battery voltage 72 18 volt battery chemistry ni cd ni mhli ion charging current 3 a