A 15A 120V wall outlet (not uncommon in the USA) can provide at most 1800W (a bit less in practice to give some headroom to avoid tripping excessively sensitive breakers). The motor wastes about half that, so you expect about 900W power output if hooking a tool up to a dynamometer. DeWalt's 60V cordless circular saw can put out over 1500W into a dynamometer[1], with similar waste (up to about 3600W max from the battery). The batteries get discharged at about 50-60A max according to the DeWalt specs I could find, which makes sense given the measured power output. Modern cordless batteries are better for actual power output than (15A) corded tools, comparable to 25A corded tools!

They're worse for run-time, of course, batteries get drained. Endurance is the issue, but battery powered tools can beat corded tools for power these days.

[1] https://www.youtube.com/watch?v=2Cjf0beYXfU