They never run out and have no cell to age. And the choice is mostly made for you: everything that heats on this site is corded, every shaver is cordless, and only one tool is both.
The split is by family rather than by model, and once you see it the question largely answers itself.
Everything that heats is corded. All four hair dryers, all nine air stylers, all twelve straighteners and every hot air brush here runs from the wall. The reason is wattage: a dryer draws 1500 to 2400 W, and no cell of a size you would hold delivers that for a styling session. There is exactly one exception on the whole site — the Grundig EasyCurl, a cordless curling barrel, and it states 40 minutes of runtime, which is the shortest figure published anywhere here.
Everything that shaves is cordless. Not one of the eight rotary or foil shavers states corded operation. Five of the eight state a waterproof or wet-and-dry rating, and a tool used in a shower is not one you want tethered to a socket.
Only the clippers genuinely offer both, and that is covered on its own page because it is the one family where the decision is yours.
So what does the cable actually buy
No charge time and no runtime limit. On a heated tool used for twenty minutes that is the whole argument, and it is why the family is built that way.
No cell to end the machine. A sealed lithium cell is not replaceable on any rechargeable tool here, so on a cordless-only product the battery is the tool’s life. A corded straightener has no such clock.
One less thing to be out of date. A corded tool bought five years ago works exactly as well as the day it arrived, which is not true of a cordless one.
And what it costs
The cable is the failure point. On every heated tool the strands break where the lead enters the handle, which is why a tool is wound loosely rather than wrapped. The Remington AC9140B publishes a 3 m cable — close to ten feet — which is more cable to flex and more to check.
And it decides where you can work. A cordless trimmer goes to a mirror with good light; a corded one goes where the socket is. On a neckline that is not a small difference.
Check your own manual before you follow anything here. Temperatures, water ratings and supply voltages differ from model to model, and the maker’s own figures take precedence over anything written on this site. A supply of the wrong voltage is a failure rather than a slow charge, and the figure is printed on the tool — not inferred from a connector that happens to fit.
Last reviewed October 10, 2026