In addition to the well established wired pumps, Poly Run now offers Lithium -powered, portable and light weight vacuum pumps. This new designed product allow a runtime of up to 60 minutes without any external power supply (only with 5Ah battery). When the brush motor works, the coil and commutator rotate, the magnetic steel and carbon brush do not rotate, and the alternating change of coil current direction is completed with the commutator and brush rotating with the motor. Brush motor is a traditional product with stable performance and the cost is also relatively competitiveness.● Battery: Runtime of 60 minutes with 5 Ah battery ● Compact: Lighter and stronger than comparable wired vacuum pumps The Li-battery vacuum pump with high performance lithium batteries, is designed to allow constant vacuum pumping for 60 minutes; lightweight design that enables the product to be carried to workplace very conveniently. The vacuum pump runs with an 18V battery which can be used in a no power supply environment. This product can run at the temperature range from -2°C~50°C, and guarantee normal starting in winter. The Li-battery vacuum pump widely used in various systems - improve and repair air conditioning systems such as R134a, R410A, R12, R22 and R502. Perfect different needs - ideal automotive air conditioning, HVAC work, refrigeration and packaging, distillation and other applications as well as industries need high vacuum compact pumps. 18V lithium battery can work for one hour without power supply, which is more energy-saving and convenient2VP-1LiB Double Stage Voltage: DC18V-5.0AH Ultimate Vacuum: 0.2PA Input Power: 180W Flow Rate: 2CFM 1L/S(3.6m³/h) Oil Capacity: 200ML Size:: 335X100X182 MM Net Weight: 4.1KG Inlet Port: 7/16”-20UNFVP-1LiB Single Stage Voltage: DC18V-5.0AH Ultimate Vacuum: 2PA Input Power: 150W Flow Rate: 2CFM 1L/S(3.6m³/h) Oil Capacity: 250ML Size: 335x100x182 MM Net Weight: 3.8KG Inlet Port: 7/16”-20UNF