A:AnswerIt isn't mean to run as a power source.
The lead acid battery which is old school is meant to be used to jump start a battery not run other electrical devices.
Anyway, the manufacturer does not say anything about the watt hours of the battery.
A:AnswerBasically it is a battery, air compressor and an inverter. So yes, it has a battery(it is one), it comes with both an AC charger as well as a DC charger.
A:AnswerNo this item will not pwoer a CPAP machine.
This isn't mean to power anything for any length of time.
The battery is just to provide a momentary jump start.