Waterpiks also have toothbrush attachments that run on the water, but I haven’t tried one yet. I’ll do so when my current Oral-B electric toothbrush dies. (I’ve never managed to successfully replace the batteries in an Oral-B, and I’m fairly good with electronics; they have ultrathin wires which they thread through sharp-edged plastic clasps to make breakage inevitable. The batteries themselves are cheap and easy to source.)
The NIMH batteries in my Panasonic are pretty easy to replace, and when they run down you can use the trimmer with the charger plugged into it; a long thin cord runs into the end of the trimmer, making it essentially a corded model. I assume pretty much any cordless trimmer can be converted to corded with an appropriate power adapter, a dremel, and some caulk or sugru to seal things up when done.
Molaroomba.
