ENERPAC 54V CORDLESS PUMP, 1L, 3/2 MAN

At 61 cubic inches of usable oil, it covers a solid range of cylinders and tools without needing anything extra on the reservoir side. The bladder design also lets you run it in just about any position, so you're not fighting the pump orientation when you're working in awkward spots.

Cordless operation is the whole idea here, so you can run it without extension cords or a generator. Batteries and a charger are included, and the charger is set up for 115V North America power.