Two 12V, sealed, lead-acid batteries provide the power—12V systems use these batteries in parallel, 24V systems use them in series. Flexible, heavy-duty, 2-ga. cable and heavy-duty thermo clamps. Recharge unit from any 110V AC outlet or by using the 12V DC to 12V DC lighter socket cord. Charger and 12V DC lighter socket cord included. Also powers your 12V devices, such as coolers and cellular phones.