The AA battery compartment for OTTOVAC, with a green on and off switch built into the cartridge.

It takes four standard AA cells, and that is the point: if you are working somewhere remote and the lithium pack is flat, batteries from any shop in the world will get the vacuum gripper running again. The switch controls the tool directly, and the compartment installs and removes without tools.

A secure fit keeps the contacts steady so you do not get power dropouts mid-lift. Cheap, simple, and worth carrying as a backup for any OTTOVAC suction gripster or electric lifter. Pair it with the Li-Ion cartridge and the gripper has two independent power sources, which is more than most vacuum lifters offer.