remote controls, wireless mice and keyboards, clocks, flashlights and torches, toys, digital cameras, portable radios, MP3 players, game controllers, smoke alarms and carbon monoxide detectors, remote car keys, calculators, digital thermometers, TV remotes, and electronic shavers
A:Depends upon your machine and model, and for what purpose. Generally, most sewing machines need much more power than what is contained in these. Thus, they are powered by mains not by small Zn-MnO2