I got tired of pumping a manual grease gun for what felt like hours on my tractor. The DIYtoolifz Cordless Grease Gun Compatible with DeWalt 20V Battery promises 12,000 PSI and an 8 oz/min flow rate, so I put it to work on my farm equipment.

This tool is built for mechanics and farmers who need serious grease output without hand cramps. It runs on your existing DeWalt 20V batteries (4.0Ah or higher recommended), which is convenient, but the battery and charger are not included. The rotating handle and LED light make tight spots much easier to handle.

What Stands Out — Key Features

• 12,000 PSI High-Pressure Motor: This thing pumps out 12,000 PSI at 8 oz/min, which handled greasing my tractor and truck suspension about 3 times faster than my old manual gun.
• Compatible with DeWalt 20V Battery: It works with DeWalt 20V batteries like the DCB204 and DCB205. I used a 4.0Ah battery and it ran strong without dying mid-job.
• 2-in-1 Rotating Handle: I switched between pistol grip for tight spots near the engine and straight grip for reaching axle fittings. It really helps in awkward positions.
• Built-in LED Work Light: The LED light made a big difference when I was greasing under the truck at dusk. No more fumbling in the dark.
• Dual Loading System: I loaded both standard 14 oz cartridges and bulk grease from a pail. It handles NLGI #0, #1, and #2 grease without issues.
• Complete Kit with 4 Couplers: The kit includes a 39.4″ flexible hose, 90° coupler, lock-on coupler, pointed tip, and standard coupler. I used the lock-on one for continuous greasing.
• Sturdy Hard Carrying Case: Everything fits in the included hard case, which keeps the grease gun and accessories organized in my truck toolbox.

Full Specifications

Pros & Cons — The Honest Take

The pros easily outweigh the cons for me — the power and speed are hard to beat, and the battery compatibility is a huge plus if you’re already on the DeWalt platform. Just plan on buying a battery if you don’t have one handy.

⚖️ How Does It Compare?

I picked the Ecarke and Saker cordless grease guns as the closest alternatives because they compete in the same battery-powered, high-pressure space. Both are popular with DIYers and pros, but each has a different focus that might suit your needs better.

If you already own DeWalt 20V batteries, the DIYtoolifz is the smarter buy because you get the rotating handle, LED light, and 4 couplers for less upfront cost. Go with the Ecarke if you need a battery included, or the Saker if you prefer 3 speed settings and don’t mind fewer accessories. For my heavy farm work, the DIYtoolifz’s rotating handle and extra couplers made it my top pick.

How It Actually Performs

Greasing Power and Speed

The 12,000 PSI motor is the real deal. I greased the ball joints on my Ford F-250 and the grease flowed through without any hesitation, even on fittings that were caked with old dirt. The 8 oz/min flow rate is noticeably faster than my old manual gun — I’d say it cut the time by about half on a full tractor greasing session, though the 3 times faster claim feels a bit optimistic for really stubborn fittings.

Battery Life and Compatibility

I tested it with a DeWalt DCB205 5.0Ah battery and got through greasing my entire tractor, a small skid steer, and a trailer hitch without needing to swap packs. The tool recommends a 4.0Ah or higher battery for best results, and I agree — a smaller 2.0Ah battery bogged down on thick NLGI #2 grease. It’s great if you already own DeWalt 20V batteries, but remember the battery and charger are not included.

Handle Flexibility and Ergonomics

The 2-in-1 rotating handle is my favorite feature. I switched to pistol grip mode when greasing the tight spots around the tractor’s PTO shaft, and flipped to straight grip for reaching the loader arm fittings. It clicks into place securely and doesn’t wobble during use. The handle does make the gun a bit bulkier than a standard pistol grip model, but the trade-off in versatility is worth it for me.

Build Quality and Kit Completeness

The metal construction feels solid, and the 39.4-inch flexible hose has held up well against sharp edges on machinery. The 4 included couplers — 90-degree, lock-on, pointed tip, and standard — covered every fitting I threw at it. The hard carrying case keeps everything organized, though I wish the hose had a dedicated storage clip inside. After a month of weekend use, nothing has leaked or broken, which gives me confidence in the 1-year warranty.

Who Is This Grease Gun Best For?

After spending weeks using the DIYtoolifz Cordless Grease Gun Compatible with DeWalt 20V Battery on my own equipment, I have a clear picture of exactly who will love it and who should pass.

✅ This Is a Great Fit If You…

• Already own DeWalt 20V batteries (like DCB204 or DCB205) and want to save money by buying a tool-only grease gun without a charger.
• Work on heavy equipment like tractors, construction machinery, or trucks and need the 12,000 PSI to push grease through stubborn fittings quickly.
• Often grease in tight spaces or dark areas — the 2-in-1 rotating handle and built-in LED light make those awkward jobs much easier.
• Want a complete kit with a 39.4-inch hose, 4 couplers, and a hard carrying case so you can keep everything organized in your truck or shop.

❌ You Might Want to Look Elsewhere If…

• You don’t own any DeWalt 20V batteries and don’t want to buy them separately, since this tool comes with no battery or charger included.
• You prefer a lighter, more compact grease gun for occasional home use — this metal-bodied unit is built for durability but has some heft to it.
• You need variable speed control for precise grease output, as this model does not offer multiple speed settings like some competitors.

My top recommendation goes to farmers, mechanics, or serious DIYers who are already invested in the DeWalt battery system and need a powerful, versatile grease gun for daily heavy use. It delivers exactly what the specs promise.

Common Issues & Fixes

After putting this grease gun through real work, I ran into a few hiccups that are worth knowing about. Here’s what to watch for and how to fix it quickly.

Grease Won’t Prime or Flow

The problem: You pull the trigger but nothing comes out, even with a fresh cartridge loaded.

My fix: Check that the cartridge is fully seated and the plunger rod is pushed all the way down. I also found that using a 4.0Ah or higher battery makes a big difference — a low-capacity battery won’t give you the full 12,000 PSI needed to push thick NLGI #2 grease through the hose.

Battery Drains Too Fast

The problem: Your DeWalt 20V battery dies after just a few minutes of greasing.

My fix: The tool recommends a 4.0Ah or higher battery for a reason. I switched from a 2.0Ah pack to a 5.0Ah DCB205 and got through an entire afternoon of greasing my tractor and truck. Also, make sure your battery is fully charged and not old or worn out.

Grease Leaks Around the Coupler

The problem: Grease seeps out around the fitting instead of going into the zerk.

My fix: This usually means the coupler isn’t seated fully or is worn out. I swapped to the lock-on coupler from the 4-piece kit and it held tight every time. Also clean the zerk fitting with a rag before attaching — dirt can prevent a good seal.

Hose Kinks or Gets Stiff

The problem: The 39.4-inch hose becomes hard to bend or develops kinks during use.

My fix: Avoid storing the gun with the hose tightly coiled in the case. I hang mine loosely or lay it flat, and the hose stays flexible. If it’s cold outside, let the gun warm up in the shop for a few minutes before use.

Warranty & Support

The DIYtoolifz comes with a 1-year warranty, which covers defects in materials and workmanship. I haven’t needed to use it yet, but the Amazon listing has a warranty link for filing claims. For quick help, I’d contact the seller through Amazon’s messaging system first.

My Final Verdict

The DIYtoolifz Cordless Grease Gun Compatible with DeWalt 20V Battery delivers a genuine 12,000 PSI and 8 oz/min flow rate that made my greasing chores noticeably faster. The rotating handle and 4 included couplers give it real versatility for tight spots. I’d recommend it to farmers, mechanics, and serious DIYers who already own DeWalt 20V batteries and need a reliable workhorse.

The biggest catch is that it’s tool-only, so you need your own battery and charger. But if you’re already on the DeWalt platform, that’s a feature, not a flaw — and the performance I got from this gun makes it a solid investment for anyone who greases equipment regularly.