Yes, I'm aware that in casual speech, "electrocute" is often used as a synonym for "electric shock."

However, in a discussion about tasers of all things, I think it pays to use the more classically correct definition. Saying that a taser is designed to electrocute you but not kill you simply invites confusion.

I'm not a prescriptivist, but I'd caution against the opposite fallacy as well. It's very useful to have distinct language for receiving electric shocks and for dying as a result, as it is to distinguish between getting wet and drowning.