So, this is an old one. What happens when you only have an ancient laptop with a dead battery and you still want to go around a convention? Bring a 120vac battery with you of course! You say you don’t have one? how about a UPS? oh yeah, I went there. so, the main problem with this is that a UPS doesn’t know you are trying to use it as a battery and it insists rather loudly that it isn’t plugged into the wall and you should rectify that soon. By that I mean it beeps rather loudly using a piezoelectric buzzer. The simple explanation is to remove it, the same way I did with my old thermostat that beeped every time you changed the temperature and I got yelled at for messing with it. That’s exactly what I did, and apparently this isn’t such a novel idea, I recently heard an interview with Jeri Ellsworth saying that she needed to do this to get an extra few hours out of her laptop on a plane. The concept is simple, here’s the pictures.
UPS Buzzer Removal