- TL;DR Summary
- I'm trying to power a device, but can't find info about the battery.
I have a C-Pap machine, and I'd like to put together something to power it for a few hours if we have a blackout. Wiring two of the above lantern batteries together should produce 24 volts. But I can't find any info on how much wattage you can draw from these before the voltage will sag. It says 7200 mAh capacity. Do I multiply that by 24 to get 172 watt/hours? This would power my (90w) C-Pap for about an hour and a half, which seems low, given the size of the batteries. What continuous wattage can I get out of a lantern battery?
I don't need rechargeable batteries, we have a blackout here less then once a year. The devices that are made for this cost $400 to $1200 dollars.