10 Best Cordless Grease Gun 2025 in the United States

The DEWALT 20V MAX Cordless Grease Gun is a strong choice for anyone needing a powerful and reliable grease gun for automotive or heavy machinery maintenance. It runs on a 20V lithium-ion battery with a solid 4.0 Ah capacity, offering good runtime and convenience since it includes both battery and charger. This gun can deliver up to 10,000 PSI, which means it can easily tackle clogged or tough grease fittings without much effort. The high flow rate of 5.0 oz/min helps speed up greasing tasks, which is handy when working on multiple fittings.

Its 42-inch flexible hose extends reach to hard-to-access spots, while the bright LED light makes working in dark or tight spaces easier. The variable speed trigger allows you to control grease flow precisely, helping avoid mess or over-application. Additional thoughtful features like the pump filter screen reduce contamination risk, and the air-bleeder valve simplifies priming after cartridge changes.

This DEWALT grease gun is well-suited for mechanics, farmers, and equipment operators who want a cordless, high-performance tool that balances power, control, and usability in one package. The tool weighs nearly 15 pounds, which may feel heavy during extended use or for users with less upper body strength. Also, while the plastic build keeps weight manageable, it may not feel as rugged as all-metal models.

The Milwaukee 2646-20 M18 2-Spd Grease Gun is designed for automotive enthusiasts and professionals who require a reliable and powerful tool for grease application. With an impressive maximum pressure of 10,000 PSI, it easily handles a variety of tasks, ensuring efficient lubrication even in challenging conditions. The 48-inch flexible hose is a standout feature, allowing users to access hard-to-reach fittings without hassle. Additionally, the air bleeder valve enables quick priming, which is particularly useful when starting a new grease cartridge. The lock-on and lock-off trigger enhances user convenience, making it easier to operate for extended periods.

This grease gun is a bare tool, meaning it does not come with a battery or charger, which could be a drawback for users who do not already own Milwaukee’s M18 battery system. Although it has a reasonable weight of 4.21 pounds, it might still feel cumbersome for prolonged use compared to some lighter models on the market. Moreover, while the grease counter dial is innovative for tracking grease usage, it may take some time for new users to get accustomed to the precision it offers.

The Milwaukee 2646-20 M18 is a sturdy and efficient grease gun that excels in performance and accessibility, making it suitable for those who regularly handle equipment maintenance. Potential buyers should consider their existing battery compatibility and whether they prefer a lighter option for extended use.

The TaskStar Battery Powered Grease Gun is a solid choice for farmers, mechanics, and truckers needing a reliable cordless solution for greasing heavy equipment. It delivers a high maximum pressure of up to 10,000 PSI and a good flow rate of 3.0 oz per minute, which helps grease tough machinery quickly and consistently. Its 21V batteries (two included, each with 2000mAh capacity) offer enough runtime to handle about 10 grease cartridges per charge, plus you can swap batteries for continuous work—handy if you're out in remote areas. The 39.4-inch flexible hose with an LED light is a thoughtful addition, making it easier to reach tight, dark spots on tractors or trailers.

The grease gun weighs just over 6 pounds, which is manageable but might feel a bit heavy during extended use. It also supports both cartridge and bulk grease loading, giving flexibility depending on your preference. The kit comes fully equipped with useful accessories like a charger, extra nozzle, extension pipe, and even gloves, so you can start working right away.

Although the battery voltage is decent, the weight and size might be a consideration if you need something ultra-light or compact for very frequent handheld use. The TaskStar’s powerful motor, variable speed control, and ergonomic design contribute to a user-friendly tool that can save time and reduce fatigue compared to manual grease guns.