... Acid recirculation system model:SXH-Ⅰ no.Charging working positionBattery / cell qty for each charging working position(2V/6V/12 V ... model:SXH-Ⅱ1, 2V battery, model:SXH-Ⅱa Charging cell qty(2V)Size (L*W*H)(mm)Pressure ... adjustable acid pump2, 2V battery, model:SXH-Ⅱb Charging cell qty(2V)Size (L*W*H)(mm) ... adjustable acid pump3, 12V battery, model:SXH-Ⅱc Charging cell qty(12V)Size (L*W*H)(mm)Pressure ...