The PB10 Series hydraulic pump delivers hydraulic fluid under pressure through the use of an electric motor and18VDC Li-ION battery as a power source. The pump is available with two bladder sizes: one with a capacity of 1.1 liters (0.29 gallons) and the larger PB10 (XL) Series bladder, which has a capacity of 4.7 liters (1.25 gallons.)