The power went out recently and I wished I had an inverter with alligator clips to clamp onto a garage car battery without killing that battery.
Walmart has 150W for about $30 but isn't that too low of an output?
One laptop PC charger output says it's is 19.5VDC at 2.8Amps while another charger says it's 20VDC at 3.8Amps (1.9Amp input at 100-240VAC, 50/60Hz).
Amazon has inverters with dual plugs (why would I need more than one plug when I can use a power strip?) and USB ports, but I don't know two things.
- What inverter size is needed to adequately charge a typical laptop?
- How long will it take for a typical car battery to die from doing that?