23' of roundover per battery charge? That's got to be a typo(?). Once around a 4'x8' sheet of plywood, that's it. Sorry, not even remotely interested.
The battery isn't built in to the router. It is easily removed and replaced in an instant. Simply swap batteries.
It is 23' of roundover per amp hour, not per battery, so a 4 amp hour battery is nearly 100 feet.
Just how large is a kitchen sink?
A cordless trim router is perfect for fitting laminate counter tops, trimming the edges and sink cut out in the hustle and bustle of construction without the cumbersomeness of a cord. One battery on the charger, the other battery in the tool. Swap. Endless power.
I have 16 identical and interchangeable 6 amp hour batteries in a comprehensive cordless tool ensemble that includes a chainsaw, a 15" string trimmer, a 15" brush cutter, a 30" double sided blade hedge trimmer, power rotating broom, 473 cfm blower, 1/2" drill, 4 speed impact driver, 1,180 ft. lb. breakaway impact wrench, stapler, drywall saw, cutout tool, oscillating multitool, close quarters right angle driver, rear handle 7 1/4" circular saw, and yes, a trim router.
As has been proven to me over and over again, in a variety of tough tasks I've put this cornucopia of tools through, battery power is simply not an issue. The more recent crop of lithium ion chemistry battery tools are very different animals than the 30 year old NiCd chemistry battery tools they replaced. If I had continued to hang on to my old memories of inadequately powered battery tools, I would have never had the chance to experience the true joy of using a power tool unencumbered by worries of accidentally cutting the cord, or not being able to start a two stroke engine.
It is nothing to swipe a battery off of another tool not in use. It is nothing to have a three battery rotation... one on the charger, one in the tool, and one already charged standing by. Power is simply not an issue with cordless any longer.
For anyone making signs, or doing a lot of directional changes in their routing processes, I would strongly encourage you to experience the freedom of cordless. It still makes me smile.