10 Best battery powered grease gun

The Milwaukee 18V Battery-Powered Grease Gun is a solid choice for those needing reliable and precise grease application. Its 18-volt battery delivers strong power, supporting up to 10,000 PSI maximum pressure, which is great for tough lubrication jobs. The grease flow rate is adjustable with a two-speed setting, and the built-in grease counter dial helps with precise dosing — a handy feature to avoid over or under-greasing. The grease cartridge holds 450 grams, which is a moderate size suited for regular maintenance tasks without frequent refills. The 12-meter flexible hose allows easy access to hard-to-reach fittings, giving good working freedom.

Weighing around 4 kilograms, it’s a bit on the heavier side, but its ergonomic design and lock-on trigger help reduce fatigue during extended use. This model is sold as a bare tool, meaning the battery and charger are not included, which adds to the initial cost if you don’t already own compatible Milwaukee batteries. Charging time and battery life depend on usage but are expected to be sufficient for typical jobs given the 18V platform.

This grease gun is suitable for automotive or industrial users who need a powerful, precise, and flexible tool and are comfortable with a mid-weight device. It may be less ideal if you need something ultra-light or expect to work continuously without swapping batteries.

The DEWALT 20V MAX battery-powered grease gun is a strong choice for anyone needing a cordless tool to handle tough grease jobs, especially in automotive or heavy equipment maintenance. It delivers a powerful 10,000 PSI max pressure, which helps push grease through clogged fittings reliably. The high flow rate of up to 5.0 ounces per minute means it can grease large areas quickly. The 20V battery platform (battery sold separately) offers cordless convenience, and the variable speed trigger lets you control the grease flow, making it easier to avoid over-greasing. A notable feature is the 42-inch long flexible hose, which helps reach tight or hard-to-access spots without strain. The built-in LED light is handy for working in dim lighting, and the no-mark foot lets you rest the tool safely without scratching surfaces.

Weighing about 3.6 kg, it’s somewhat heavy but still manageable with the included shoulder strap. The air-bleeder valve simplifies cartridge changes by easing pump priming. One downside is that the tool doesn’t come with a battery or charger, so you’ll need to have compatible DEWALT 20V batteries on hand or buy them separately, which adds to the cost. Additionally, the weight might be a bit much for long periods of use, especially for those looking for a lighter option. This grease gun is suited for professionals or serious DIYers who want a durable, high-pressure cordless grease gun with good reach and control. For those prioritizing battery convenience and power, this DEWALT model meets those needs well, though casual users might find it somewhat heavy and will need to invest in batteries separately.

The Ryobi 18V Volt Cordless Grease Gun P3410 is a solid choice for those needing a battery-powered grease gun with good power and efficiency. It operates at 18 volts, which is common for cordless tools and fits well within Ryobi's large ecosystem of compatible batteries. The grease gun delivers a high maximum pressure of 10,000 PSI and a flow rate of 7.5 ounces per minute, making it capable of handling tough greasing jobs quickly.

The steel grease tube adds durability, which is important for long-term use in demanding environments. Weighing about 3.79 kg (around 8.4 pounds), it’s somewhat on the heavier side, so it might feel a bit bulky during extended use, especially for users seeking a lighter option.