This 12v dc input lead acid battery charger is suited to charge single cell Lead Acid battery using a car's electrical system 12V or 24V as power source. The car battery charger 12/24v accepts a wide range of input voltage from 10-40Vdc, and powers up the battery at up to 2.5-3A with regulated charging current as well as the charging voltage(10-14.7V) to safely and efficiently charge the battery, maximizing battery capacity and life. Likes a regular AC /DC battery chargers, the dc-dc battery charger has three states: a high-current bulk charge state, an equalize charge state, and a float charge state for a precise charging, comes with a two color LED light displays the charge states. DC to DC battery chargers are an important part of Intai's product line - a variety of DC input battery charger is available here to be used for different applications includes Lithium ion batteries, LiFePO4 batteries, NiMH batteries, Seal Lead-acid batteries and other high-performance AGM batteries in addition to flooded batteries.