Run two 18V tool batteries in parallel and double your runtime. The Double Battery Adapter connects two matching packs into one output, so the Volt Dropper, Volt Booster and the rest of the Volt range run twice as long on the batteries you already own. Ideal for long days off grid, powering a 12V fridge overnight, or keeping gear running through a full shift on site. Doubles runtime by running two matching 18V packs in parallel Available for Milwaukee, Makita, DeWalt, Ozito, Hikoki/Hitachi, Stanley/Craftsman, Bosch (GBA and PBA), Black & Decker/Porter Cable and Worx (5 pin) batteries Pairs with the Volt Dropper for 12V gear, the Volt Booster for 240V mains and the Volt Rapid for USB-C power Australian owned, same or next business day dispatch, 30 day returns, 12 month warranty