An excellent for value-priced high performance DC charging, the 2000 Sp Series units include a battery type selector switch allowing you to charge Lead Acid, Gel or AGM batteries. 3-Stage charging delivers the greatest charge when the battery is most able to accept it, preventing overcharging and extending battery life. Units restore up to 3 banks simultaneously. Other features include the ability to act as a power supply, ignition and reverse-polarity protected, easy-to-read DC ammeter, corrosion-resistant components and housing, and a heavy-duty heat sink design. Exterior slots allow for easy mounting. 2-year limited manufacturer's warranty, made in the USA.