TLDR Review: Milwaukee M12 Battery 48-11-2425
Verdict
The Milwaukee 48-11-2425 M12 REDLITHIUM HIGH Output CP 2.5Ah Battery excels in providing a powerful and long-lasting output, especially for tasks requiring significant power. However, it may not be compatible with all M12 Fuel tools, leading to potential inconvenience. Overall, it's a great choice for Milwaukee tool enthusiasts who seek reliability in rigorous conditions, but verify compatibility with your specific tools.
- Top pro:
- Comes with two M12 battery upgrades for significantly longer runtime.
- Top con:
- The 2.5 Ah battery does not work in the M12 Fuel Oscillating Multi Tool, causing flashing lights.
Pros
- •Comes with two M12 battery upgrades for significantly longer runtime.
- •Compact and lightweight, yet comparable in power to larger M12 batteries.
- •Capable of drilling through 4" cement blocks on one charge.
- •Thermal Protection Mode activates after 12 holes, ensuring safety.
- •Performance validated under rigorous testing conditions.
- •Battery runs cooler and provides more power than standard options.
- •Effective in colder temperatures and offers resistance housing against solvents, oil, and grease.
Cons
- •The 2.5 Ah battery does not work in the M12 Fuel Oscillating Multi Tool, causing flashing lights.
- •Users experienced hassle with needing replacements for certain tools.
- •Some uncertainty remains about overall quality until prolonged use is tested.
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How we researched this
About this review: it summarizes the professional reviews and customer ratings ShopSavvy collected for this product, alongside prices from 1 retailer in ShopSavvy's price data, most recently seen Sep 21, 2026.
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