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BFam!
Reviewed in the United States on June 6, 2025
Strong performance and long life. These replacement batteries fit perfectly and charge just like the originals. No issues with runtime or power output. A reliable backup or primary set for your cordless tools. Good stuff, happy. Can never have too many batteries!
Second Century
Reviewed in the United States on June 3, 2025
Fits. Works. Great price. Battery lasts long enough, but I couldn't tell you whether it's actually 4Ah.
Corey
Reviewed in the United States on May 6, 2025
Since I'm not using my screw gun for anything too crazy, it's more or less for home improvement in basic projects that I'm working on, so I don't need the maximum power I can get out of it.One of my batteries have stopped working even though I barely used it it just keeps throwing an error on the charger and I'm currently left with one battery. As you can guess, they got so little annoying cause what I have to charge, I have to stop what I'm doing and put the battery on the charger and I'm down a tool.These batteries fit right in place and work in my factory charger, and I can't say I'm noticing any difference in the performance of the tool, or how long the batteries lasting cause I never use it to drain it in a single session. They don't feel much different compared to the factory ones either, so I'm happy to have these added to my kit.
Ron in Arizona
Reviewed in the United States on May 18, 2025
These batteries fit and work well in my Milwaukee hand tools. Ron in AZ🤠
Byron L.
Reviewed in the United States on May 10, 2025
Charged both out of the box. Used with my M12 stubby G2 on 14mm bolt that was pretty stuck. Gun stopped working after impacting for about 4 seconds. Pulled the battery and put it on the charger, light turned red then green within 2 seconds, followed by both lights flashing back and forth. I had high hopes going off the reviews but will just invest in the real ones. Needless to say these are going back.
Steve
Reviewed in the United States on April 27, 2025
It's difficult to give a proper review to batteries like this without test equipment, which I don't have. I can tell you that the batteries do work in my Milwaukee 12V tools and charger. They are rated at 4Ah, but the original Milwaukee batteries are rated at 2Ah, and they both weigh about the same, so I'm not expecting extended life from them; in my experience, which has been mirrored in tests by others done online (check YouTube), third party batteries rarely have as high a capacity as the name brand. I'd probably be a lot more confident in them if they hadn't felt the need to boost the amp rating so much
L
Reviewed in the United States on April 26, 2025
I picked up this 2-pack of 4.0Ah batteries to replace the old ones for my Milwaukee M12 tools, and I’m super impressed. These batteries are a solid upgrade from the 2.0Ah versions.Has more power and runtime than the standard batteries. I get through a full day of work without needing to swap batteries out, even on tougher tasks like drilling through thicker materials. They fit perfectly with my Milwaukee M12 tools, impact drivers, drills, all of the M12 Tools. No issues with charging, and they click in securely.These batteries feel solid, nice and sturdy with no cheap plastic feeling. They hold up well during heavy-duty work and have been reliable so far. I’ve used these batteries in a variety of tasks like; drilling, cutting, and driving, and they consistently perform just like the original Milwaukee batteries, but with the added benefit of longer runtime. No weird power drops, even when pushing the tools hard.These batteries are a little heavier than the 2.0Ah versions, but the extra runtime makes it worth it. Getting a 2-pack is a huge plus since you’ve always got a backup ready whenever you run out of juice.If you’re using Milwaukee M12 tools regularly, this 2-pack of 4.0Ah batteries is a no-brainer. They’re affordable, reliable, and give your tools the extra power they need to keep going all day.
hubflubalub
Reviewed in the United States on April 14, 2025
This is the third order of aftermarket M12 batteries I've received in the past couple weeks (two prior were the XC type, each different brands), and these batteries are are the first out of these orders that I actually felt confident in their being safe to plug into my chargers and tools.Unlike the other batteries I received, I was satisfied with what I saw when I disassembled these. The cells are securely packed together, wire routed neatly and cleanly, the soldering well done, and the nickel strips solidly spot welded on the battery ends. The thermistor that is used to report battery temperature to the tool's control board is seated deeply between all 3 cells, which is much better (provides more accurate reporting) than other designs I've seen that leave them hanging off the battery pcb.The cells themselves are PROS18650F2, which appear to be serviceable for this application as per the results of certification testing I found for this cell type online (see attached image). Not sure how long they'll last, given that they're not made by a major manufacturer, but I don't expect OEM quality and service life from an aftermarket product, so I'll be happy if they last a reasonable length of time for their price. I'll be giving these a good round of testing in actual use scenarios over the next week. If I notice anything that's worth mentioning, I'll update the review to share the details.As it stands, I think this is a pretty solid buy if you need some aftermarket batteries to get you by.
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