How Does Milwaukee's New Super Charger Compare To The Previous Models?

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One of the many new Milwaukee products released in 2026 is the brand's first four-bay Super Charger for its M12 and M18 batteries. The M18 & M12 Four Bay Simultaneous Super Charger (model 48-59-1818), which is rolling out across retailers over the summer, doesn't come cheap, at $499. However, its ability to charge four batteries simultaneously may justify that cost, be it for professionals using multiple tools or homeowners and DIYers who want to speed up their workflow by charging multiple batteries.

While there are Milwaukee chargers that can charge up to six batteries at once, those are rapid chargers, not the brand's highest-speed Super Chargers. Besides the obvious support for four batteries, what other differences are there between Milwaukee's new model charger and previous models? 

One metric most buyers comparing models will likely be most interested in is just how fast Milwaukee's Super Chargers work and whether any are faster than the newest product in the lineup. The M18 & M12 Four Bay Simultaneous Super Charger can fully charge four M18 Redlithium Forge HD12.0 Batteries in 90 minutes, which is pretty impressive. In 35 minutes, it can bring an XC8.0 or HD12.0 Redlithium Forge battery up to 80%. Here's how that compares to Milwaukee's previous offerings.

Milwaukee's now-discontinued M18 & M12 Super Charger (model 48-59-1811) was promoted as being four times faster than the standard chargers of its time, capable of fully charging an M18 Redlithium High Output HD12.0 in just 1 hour. That's shorter than the M18 & M12 Four Bay Simultaneous Super Charger's 90-minute claim, but considering you're charging four batteries at once (and Forge batteries at that), it's not the win that it sounds like.

The M18 Dual Bay Simultaneous Super Charger (model 48-59-1815) charges two batteries at once, but only supports M18 batteries, so it's a trade-off. This dual-bay model can charge M18 RedLithium Forge XC8.0 and HD12.0 batteries to 80% in 35 minutes, just like the four-bay device. It can also get an M18 RedLithium Forge XC 6.0 to 80% in 15 minutes.

Milwaukee also has the MX Fuel Super Charger (model MXFSC). While it takes a little longer to recharge a single battery, that's because it's in a league of its own: MX Fuel is a much beefier power system than M12 or M18. In fact, the MX Fuel RedLithium Forge HD12.0 is the strongest battery Milwaukee makes, so the fact that the Super Charger can charge it in 65 minutes isn't bad at all. It can also charge an MX Fuel RedLithium Forge XC 8.0 in 45 minutes. However, it can only charge one battery at a time.

There are other features that not all Milwaukee Super Chargers share, though, and those are also worth comparing. For example, the M18 & M12 Super Charger (model 48-59-1811) may be pretty fast, but it lacks Milwaukee's latest charging technology. While it is equipped with Redlink Intelligence, which optimizes performance and charging, it doesn't have Charge Adapt. So, while it is dual-bay, it can only charge batteries sequentially.

That's likely why it's discontinued, as the M18 Dual Bay Simultaneous Super Charger (model 48-59-1815) essentially makes it obsolete. It has Redlink Intelligence and Charge Adapt, allowing it to charge two batteries at once. It also features Cool-Cycle technology that keeps batteries cooler as they charge, allowing them to both charge faster and work better. However, the new M18 & M12 Four Bay Simultaneous Super Charger is also equipped with all of this technology, giving the Dual Bay no advantage.

The M18 & M12 Four Bay Simultaneous Super Charger is also Packout compatible, which no other Milwaukee Super Charger can claim. What it doesn't have, however, is Milwaukee's One-Key tracking and management technology, which the MX Fuel Super Charger does, in addition to Redlink and Cool-Cycle. That's one of the only comparisons where the Four Bay charger doesn't come out on top, but it's moot since the MX Fuel Super Charger serves a completely different power system. One thing that we can't quite compare yet is real-world performance, as Milwaukee's four-bay charger is too new for much information to be available. That said, it will likely resemble Milwaukee's other Super Chargers, which tend not to match manufacturer claims exactly.