This bundle pairs the Milwaukee M18 TOP-OFF 175W Power Supply with the Milwaukee M18 REDLITHIUM XC5.0 Oil & Solvent Resistant Battery — because the power supply ships without a battery, and buying the two together means you're not stuck borrowing one from a drill or impact driver just to charge your phone. Model Numbers: 2846-20 (M18 TOP-OFF 175W Power Supply), 48-11-1850R (M18 REDLITHIUM XC5.0 Resistant Battery).

The 2846-20 is a compact battery-powered inverter that turns any compatible M18 battery into a portable power source for small electronics. It delivers 175 watts of continuous power through one 120V AC outlet, one 45W USB-C Power Delivery port, and one USB-A 2.4A port — enough to charge or power up to three devices at once, including phones, tablets, laptops, and small lights. At 0.8 lb and roughly 3.78 in x 3.3 in x 3.33 in, it's small enough to live in a bag or gang box, and a built-in metal rafter hook lets you hang it from carts or lumber when bench space is tight. Built-in overload protection helps guard both the unit and whatever's plugged into it.

The 48-11-1850R battery works just like a standard XC5.0 pack and is compatible with the same tools, but adds a resistant housing built to hold up against oils, greases, and solvents — useful in automotive and manufacturing environments as much as on a typical jobsite. It delivers 2.5X more runtime and 20% more power than standard lithium-ion batteries, runs cooler, performs in cold weather, and includes an onboard fuel gauge so you can check remaining runtime at a glance. REDLINK Intelligence circuitry manages overload protection and cell monitoring across the battery, tool, and charger.

This is the right bundle for electricians, HVAC techs, plumbers, service pros, and remodelers who already run M18 tools and want a self-contained way to keep phones, tablets, and laptops charged on-site — without pulling a battery off a tool that needs it. It's also a solid pick for anyone building a mobile workstation or truck setup around the M18 platform.

The power supply, minus the "wait, I need a battery" problem

The 2846-20 is genuinely useful, but it's sold bare — this bundle fixes that by putting a real, oil-and-solvent-resistant XC5.0 battery in the box with it.

• Who it's for: M18 users — electricians, HVAC and service techs, remodelers — who want a self-contained way to charge phones, tablets, and laptops on-site without pulling a battery off a tool.
• Why it stands out: Both halves of this bundle are platform-flexible: the power supply runs on any M18 battery, and the included battery runs any of the 200+ M18 tools, so you're never locked into using them only together.
• Worth knowing: No charger is included. Once the included battery runs down, you'll need your own M18 charger to bring it back up — this bundle gets you the power supply and the battery, not the full charging loop.

• Does this bundle include a charger? No. It includes the 2846-20 power supply and the 48-11-1850R battery only — you'll need your own M18 charger to recharge the battery once it's depleted.
• Can I use the included battery in my other M18 tools? Yes. The 48-11-1850R is fully compatible with all 200+ Milwaukee M18 cordless tools, not just this power supply.
• Can I use a different M18 battery with the power supply instead? Yes. The 2846-20 fits all Milwaukee M18 batteries, so the included XC5.0 battery isn't the only one that works with it.
• How many devices can the power supply run at once? Up to three — one through the 120V AC outlet, one through the 45W USB-C Power Delivery port, and one through the USB-A 2.4A port.
• What makes this battery different from a standard XC5.0 pack? It performs identically but adds a resistant housing designed to hold up against oils, greases, and solvents, on top of the standard onboard fuel gauge and REDLINK Intelligence.