An extra cordless tool battery might not be the most exciting tool purchase, but it’s one of the best upgrades you can make if you use your tools regularly. Having a spare battery ready means you don’t have to stop a project just because one pack dies halfway through. That’s especially useful for automotive work, home repairs, electrical jobs, plumbing projects, assembly work, and anything else where you’re moving between tools or working away from an outlet. For anyone already using Milwaukee’s M12 lineup, a compact backup battery can make those smaller tools even more convenient.
Right now at Walmart, you can get the Milwaukee M12 RedLithium 2.0Ah Battery on sale for just $41, which is nearly 41% off its normal $69 price tag. This compact 12V battery has a 2.0Ah capacity and is designed to power Milwaukee M12 cordless tools. Milwaukee says it delivers up to two times more runtime, 20% more power, and two times more recharges than standard batteries.
41% OffThe biggest selling point here is that it’s a low-cost way to keep your M12 tools running longer without buying another full kit. Milwaukee’s M12 lineup is popular because the tools are compact, lightweight, and easy to use in tight spaces, which makes them great for mechanics, electricians, DIYers, and homeowners. This battery is built for all-weather performance and can operate in temperatures below 0 degrees Fahrenheit, while RedLink Intelligence helps protect it from overloads.
The compact size also keeps smaller tools easy to handle, which matters if you’re working under a dash, inside a cabinet, around an engine bay, or anywhere a bigger 18V tool feels bulky. This isn’t really a useful buy if you don’t already own M12 tools and a compatible charger, but for anyone already invested in Milwaukee’s 12V ecosystem, it’s a great price for an extra battery.
“If you love Milwaukee you will love this,” said one happy buyer. “It appears to be fully authentic in original packaging.”
“These batteries are well-made and last a long time,” said a second shopper. “Genuine Milwaukee.”
Deals We’re Loving
- Milwaukee M18 RedLithium 6.0Ah Batteries, $164 (was $299) at Walmart
- Milwaukee Shockwave 100-Piece Impact Driver Bit Set, $65 (was $103) at Walmart
- Milwaukee Power Tool Charger, $50 (was $124) at Walmart
Discounts this big on name brands like Milwaukee don’t come around often, so head over to Walmart’s site today and get your hands on the Milwaukee M12 RedLithium 2.0Ah Battery for only $29 while it’s still on sale for 41% off.
About the author

Andrew Koopman
Commerce Writer, Autoblog
