From the other side, tazers are wildly OP in the hands of the player. The few monsters that might be frightening early game, become no problem after you get a tazer and some batteries. Likewise any NPCs with melee weapons. Just zap them and run away. And even electrical enemies, which you might expect to be immune, don’t seem to be.
Furthermore, tazers are activated instead of used as a weapon, so you don’t actually have to be holding it. You can use it from your backpack without dropping or sheathing your main weapon. Do they even need a successful attack roll? I don’t recall ever missing with one. Tazers hold 500 batteries, making them smaller and lighter than the batteries themselves. So carrying four or five tazers is not bad idea for storage and protection.
They need some kinda nerf. I’d say remove real HP damage entirely and just have them cause pain/stun. Then a zapping enemy would be dangerous when in a group with other enemies, but wouldn’t instakill you solo.
But my biggest complaint is that they are called tazers when they are clearly stun-guns.