The LuMax HandyLuber 12V Cordless Grease Gun offers an ergonomic design and is constructed for durability. It has a maximum operating pressure of 7,000 psi and high flow rate of 3.5 oz/min. This grease gun features a built-in pressure relief valve and a 1500mAh Ni-Cd battery capable of delivering five cartridges of grease on a single charge, according to the company. The Handyluber comes in a slim-line carrying case with a 30" ultra-flex hose, grease coupler and one-hour quick charger.