Lithium battery for CPAP machine

gobi

Member
I wanted to use my ResMed while I on the road.

I started out with this solution:

1. 12 Volt ResMed power adapter (bought online)
2. A 90ah vehicle starting battery I had laying around.

Worked but heavy - The 31d battery worked fine for 3 nights of use, but that thing was heavy, and I had to take it out of the van to charge it.

After I had to lift and move it few times I was ready for a lighter solution.
I bought a 100ah Litto Kala lifepo4 battery (well I made it myself :) )

ResMed CPAP > 12 Volt Power Adapter > 12v 100ah Lithium battery

Next in my list is to set up a charging link so I can use it to charge the 100ah Lifepo4 battery from my van's alternator.
I will be charging @ 10a max.
The 100 ah battery is used to power my laptop using a small 200w inverter. So this little battery gets a lot of use.
 
Nice 👍. My dad used to have one of these machines. He had a plug that plugged into the cigarette lighter for his so he could use it in his truck when he slept at night. Smart idea.
 

gobi

Member
Thread starter
Was that out of a jump-starter?
lol, no, I had a smaller AGM batt (acdelco) that died under warranty, took it to the distributor and he did not have a little one, instead paid the diff (30$) for the biggest baddest AGM they had in stock :)
 

gobi

Member
Thread starter
Auto, but I was shocked they had this in stock and it was fresh stock.
The weight just makes it a semi portable unit.

batt_agm.jpg
 
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