The Milwaukee 2847-20 M18 TOP-OFF Charger & Power Supply is a compact battery charger and USB-C power supply built for users already invested in the Milwaukee M18 platform. This is a battery charger and portable USB-C power supply designed for charging M18 batteries and powering small electronics on the job or on the go. Model Number: 2847-20. If you carry M18 packs every day and also rely on a phone, tablet, headlamp, or laptop, this unit cuts down on extra chargers and keeps your setup simpler.

What makes this one matter is that it is not just an M18 charger. Milwaukee built in advanced USB-C PD charging with a 100W USB-C PD port and a second 15W USB-C port, so the same unit can recharge an M18 battery and serve as a practical power source for devices that actually matter on site. That is a real benefit for punch lists, service calls, inspections, estimating, and any job where your phone or tablet is part of the workflow.

Size is a big part of the appeal here. Milwaukee calls it the most compact M18 battery charger, up to 65% smaller than traditional kitted chargers, and the listed dimensions back that up: 3.71 inches long, 3.04 inches wide, and 1.9 inches high. At 0.5 lb, it is easy to leave in a bag, glove box, or gang box without thinking twice. For contractors who hate carrying dedicated chargers that take up too much room, that smaller footprint is the whole point.

On the performance side, the unit delivers 115W continuous power and is designed to work with all Milwaukee M18 batteries. Milwaukee specifically positions it for charging headlamps, cellphones, tablets, and computers, so this is a good fit for crews and trades that depend on connected devices throughout the day. The included 100W USB-C cable and 65W USB-C wall adapter mean you can use it right out of the box instead of chasing down compatible accessories.

Milwaukee also gives useful real-world examples for what this charger and power supply can do. With an M18 XC 5.0 Battery, it can charge a phone up to five times, and that same battery can be recharged in about 105 minutes using the included 65W wall charger. That gives buyers a better sense of where this fits: not as a full power station replacement, but as a compact platform-based charging solution for day-to-day electronics and battery maintenance.

From a jobsite practicality standpoint, this tool is straightforward and useful. It has overload protection, clear battery charge indication, and a layout that keeps it simple to use without extra setup. If you already own M18 packs, this is one of those accessories that earns its place quickly because it helps the batteries you already own do more than just run tools.

The best buyer for the Milwaukee 2847-20 M18 TOP-OFF Charger & Power Supply is someone who is already on the Milwaukee M18 battery system and wants a compact charging solution for both batteries and electronics. Electricians, service techs, general contractors, HVAC crews, remodelers, and serious DIY users will get the most value here. If you need to keep laptops and mobile devices alive between outlets, but you do not want to carry a bulky inverter or separate charger, this is the cleaner answer.

Milwaukee 2847-20 M18 TOP-OFF Charger & Power Supply Is the M18 Accessory You Actually Keep With You

This is a smart buy for M18 users who want one compact unit that can charge batteries and keep the electronics they work from alive during the day.

• Who it's for: Milwaukee M18 users, service techs, contractors, and serious DIYers who depend on phones, tablets, lights, and laptops while working.
• Why it stands out: The combination of all-M18 battery compatibility, 100W USB-C PD output, and genuinely compact size makes it more useful than a standard charger.
• Worth knowing: This is not trying to be a big inverter or full power station. It is a compact, practical charger and USB-C power solution built around the M18 platform, and that focused job is exactly why it makes sense.

• Does it work with all M18 batteries? Yes. Milwaukee lists the 2847-20 as fitting all M18 batteries.
• What devices can it charge? Milwaukee states it is ideal for headlamps, cellphones, tablets, and computers through its USB-C ports.
• How much power does the USB-C PD port provide? The primary USB-C PD port provides up to 100W, and the second USB-C port provides 15W.
• How long does it take to recharge an M18 XC 5.0 battery? Milwaukee states recharge time is approximately 105 minutes when using the included 65W wall charger.