The Festool 202502 18V ERGO AC Power Adapter is a mains adapter for select Festool cordless sanders, model number 202502. This is a mains adapter designed for continuous sanding with AC power. If you already run an ETSC 125, RTSC 400, or DTSC 400 and want to work longer at the bench, in the shop, or on repetitive finish work without cycling batteries, this is the part that makes that setup possible.

Instead of treating your cordless sander like a battery-only tool, this adapter lets you snap into a wall-powered setup using the included Plug-It power cord. That matters when the job is less about mobility and more about steady runtime. For long sanding passes, surface prep, and repeat work where stopping to change batteries slows you down, this adapter keeps the tool running continuously from a 100 to 120 volt AC source while delivering 18 to 20 volt output to the compatible sander.

Festool built this adapter specifically for the ETSC 125, RTSC 400, and DTSC 400. That is a big point here. It is not a universal adapter for every Festool cordless tool, and it is not meant to be. The benefit is a more seamless fit and better balance on the tool. Festool calls out the ergonomic, lightweight design, and at 0.66 lbs it is light enough to support extended sanding without adding the kind of awkward bulk that would throw off control.

From a practical jobsite and shop standpoint, this accessory makes the most sense when you have reliable power nearby and want to save battery packs for punch-list work, service calls, or areas where cords get in the way. On trim, cabinet, drywall patch, or finish sanding tasks, being able to switch between cordless freedom and corded runtime gives you more flexibility from the same sanding platform. If your work changes from room to room, you can stay cordless. If you are parked at a table or working through a long sanding cycle, plug in and keep moving.

It is also part of the Festool Plug-It system, which matters if you already use Festool sanders and cords. The included SJO 18 AWG-4 Plug-It power cord gives you what you need to start using the adapter right away, and the unit is compatible with 18 AWG Plug-It cords used with Festool Plug-It equipped sanders. Rated at 150 watts, it is built around the power needs of these specific cordless finish sanders rather than trying to cover a broader range of machines.

Who should buy this? Pros and serious DIY users who already own one of the three compatible Festool cordless sanders and want more flexibility out of that tool. If you are a finish carpenter, cabinet installer, painter, remodeler, or woodworker doing sanding in fixed work areas, this accessory makes a lot of sense. If you need something for other Festool cordless machines, this is not the one. It is a purpose-built adapter for a specific sanding platform, and that is exactly why it is useful.

Festool 202502 18V ERGO AC Power Adapter for sanding without the battery shuffle

This is a smart add-on for anyone who loves the feel of Festool's cordless finish sanders but spends a lot of time sanding near an outlet.

• Who it's for: ETSC 125, RTSC 400, and DTSC 400 owners doing finish sanding, cabinet work, trim work, or shop-based prep where continuous runtime matters.
• Why it stands out: It is purpose-built, lightweight, and balanced instead of being a generic adapter that technically works but feels awkward on the tool.
• Worth knowing: This is not a catch-all Festool power solution. It is specifically for those three sanders, which is great if you own them and a deal-breaker if you do not.

• What tools does this adapter fit? It is designed for the Festool ETSC 125, RTSC 400, and DTSC 400 cordless sanders.
• Can it power other Festool cordless tools? No. Festool specifically states it is not suitable for other cordless machines.
• What kind of power does it use? It runs from a 100 to 120 volt AC power source and provides 18 to 20 volt output for the compatible sander.
• Is this meant for long sanding sessions? Yes. Its main benefit is continuous electrical operation when you are working near wall power and do not want to stop for battery changes.