I use a CPAP machine to keep my airway open while I sleep. I want to configure a light and energy dense battery setup so I can go camping with my CPAP. Figure on three days worth of power. Trying to keep costs down as a third criteria. Thinking Lithium Ion. The CPAP input is 12V@1.5 amps. Figuring on a 20 watt power consumption. Question is, as a novice, am I correct in figuring I'll need 480 watt-hours (20 watts x 8 hrs sleep x 3 days). Seems like a sizeable battery pack if I am not mistaken. Who do I get it from? I know Li battery technology can be somewhat dangerous if mishandled i.e. overheated, hot overcharge, ect. Is there a more practical battery technology suggestion for my application that I am not aware of? I'll gladly take any suggestion or guidance and link to research. The criteria again is reliability, lightweight and portable, compact as is practical. Thanks in advance.
- posted
15 years ago