I teach NRA Basic Pistol and double up with custom ear plugs and electronic muffs, Peltor Sports. I've tried Walkers and Pro Ears which I keep on hand to loan to students I'm line coaching. I much prefer the Peltors. My experience is that electronic muffs are at least as good as the non electronic ones I've used in the past.

Yeah, the batteries and on/off switch and volume control can be a hassle. IMHO, the benefits far outway the drawbacks.