Mellif Power Grease Gun Compatible with Milwaukee 18v Battery - 10,000

In this review the Mellif Power Grease Gun is evaluated as a cordless lubrication tool for mechanics and shop owners who already carry Milwaukee 18v batteries. The bottom line: it is a high-pressure, brushless grease gun that delivers strong pumping power and a long 14 oz cartridge capacity, making it a good choice for heavy duty greasing tasks where reach and flow matter. The reviewer found the core strengths to be pressure, flow rate and build quality, while noting the tool can be tricky to prime and battery life reports are mixed.

Key Features

• Brushless motor: Provides up to 10,000 PSI and strong torque for demanding lubrication jobs without the maintenance of brushed motors.
• High flow rate: Delivers up to 10 oz/min at highest speed, helping finish repetitive greasing faster than lower flow models.
• Compatibility with Milwaukee 18v: Accepts Milwaukee 18v batteries so users with that battery ecosystem can share power across tools.
• Large capacity and reach: Holds a 14 oz grease cartridge and includes a 30' hose for easier access to tight or awkward fittings.
• Safety and protection: Built-in safety lock prevents accidental activation and low-voltage protection shuts the tool off when voltage drops below 14.4V.
• Continuous pump and air bleed: Continuous mode and an air-bleeder valve make pump operation smoother once the tool is properly evacuated of air.

Who It's For

This grease gun is best for professional mechanics, fleet technicians, and serious hobbyists who need high pressure and steady flow for regular lubrication tasks. It fits particularly well when a shop already uses Milwaukee 18v batteries, since that avoids buying a separate battery platform.

Those who should look elsewhere include buyers who need a kit with battery and charger included or users who want effortless priming out of the box; a few customers report it can be hard to prime and that prime retention can be an issue. If battery compatibility with other brands is required, a different model may be a better fit.

Pros & Cons

Pros

• High output pressure and flow make quick work of heavy greasing tasks.
• Large 14 oz capacity and long 30' hose reduce refill frequency and improve reach.
• Solid build quality, safety lock and low-voltage protection add to workshop reliability.

Cons

• Can be difficult to prime and some users report issues with prime retention.
• Sold as tool only, so buyers must budget for a compatible Milwaukee 18v battery and charger separately.

Specifications

Motor type	Brushless
Maximum pressure	10,000 PSI
Maximum flow rate	10 oz/min (speed 5)
Grease capacity	14 oz (400 g)
Hose length	30 in (76 cm)
Safety features	Safety lock, low-voltage protection

Our Verdict

The Mellif Power Grease Gun is a high-pressure, well-built tool that represents solid value for users who already own Milwaukee 18v batteries and need strong flow plus extended reach. It is recommended for shops and serious DIYers who tolerate an initial priming step and will supply their own battery, as performance and capacity justify the investment.

Frequently Asked Questions

Is a battery included?
No, this product is tool only and requires a Milwaukee 18v battery and charger, which are sold separately.

Why is priming important?
Air trapped in the system prevents grease flow; evacuating air before first use and using the air-bleeder valve helps ensure smooth pumping.

What protection features does it have?
The gun includes a safety lock to prevent accidental activation and low-voltage protection that shuts the motor off below 14.4V.