Hmmm. Lightweight AGM Battery For CPAP?

MEXICOWANDERER wrote:
Just musing possibilities. Can't have everything - light weight, amp hours, thick plates and low price.

But the 'lil sister versions of this critter may be interesting as an overnight CPAP power source that can be configured to recharge from a cigarette lighter socket with a running rig engine...would need a good handle and 12 volt connector and fuse to the machine.

50 watts is what my unit draws when the humidifier heater is going full song - but unless it's Freeze The Cajones Off A Copper And Zinc Primate weather, the humidifier works a small percentage of the time.

Better 'n a kick in the butt with a sharp stick...

https://deepcyclebatterystore.com/full-throttle-battery/

I bought my Lifeline Batteries and my Excide AGM starter battery from this company. They know batteries talk to Jeff out there.

MrWizard wrote:
i think too small

6.6ah 84 wh

50 percent of a 20ahr agm would be 10 ahr and still have some left over

remember this is for a Cpap machine, the user can't be running out of power in the middle of a bus ride

I also think that maybe that's too small. For my BiPap I plug into a 12vdc plug by the bed in my Class C. I now besides having to use a b-Pap machine use one of these for my Oxygen Concentrator

I wish you luck.

If you want some old laptop batteries to harvest, I know I guy that knows a guy.

MEXICOWANDERER wrote:
Lithium? Social Security? Sigh. Like tempting a dumpster diver with a menu from Maxim's of Paris :(

Maybe where you are at, but many people "harvest" 18650 cells from "dead" laptop or power tool battery packs. The test them and sort them and "roll their own" for the cost of some wire solder. Many will make homemade spot welder to weld tabs on to the batteries.

Lithium? Social Security? Sigh. Like tempting a dumpster diver with a menu from Maxim's of Paris :(

I have a battery pack for my C-PAP machine. I have since changed to a BiPAP Machine. My portable battery pack will run my BiPAP Machine for 24 hrs. But it needs to be recharged daily, My Bipap will work on my house batteries for weeks at a time with no problems.
I switched my Flooded Batteries to AGM Batteries. I have 6-Lifeline 6 volt, 220 ah, Deep Cycle Marine/RV Battery 10.22"L x 6.95" W x 10.28" T system. A lot better than the Interstate U2200 Workaholic Batteries. Although I really can't say too many bad things about the Interstate Batteries,
I installed them in 2007 and they finally took a dump on me, could be from neglect. When we took them out of the RV they were all bone dry and dead as door nails.

i think too small

6.6ah 84 wh

50 percent of a 20ahr agm would be 10 ahr and still have some left over

remember this is for a Cpap machine, the user can't be running out of power in the middle of a bus ride

How about this?

http://www.batteryspace.com/LiFePO4-Belt-Bag-Bike-Battery-12.8V-6.6Ah-84-Wh.-14A-rate-Charger.aspx

Unlike AGM you can use almost all the stored power

I would want an AGM battery that can handle huge recharging amperages without issue, and I would have a direct feed from alternator to quench the SOB, and curse at 12v ciggy plugs remove them, smash them with a large sledgehammer until there was a 6 inch deep hole where they once were.


This would limit my choice to Odyssey AGM, Like the 34AH PC950 @ 20Lbs and 480CCA



http://www.odysseybattery.com/extreme_battery_specs.aspx

Most all The UPS AGMS all say to limit amperage to 1/3 of their capacity.

I bookmarked these a while back as they claim 'HIGH RATE performance, and strangely "thick plates" too.

Obviously more budget friendly:

https://www.amazon.com/Cycle-Battery-Wheelchairs-Scooters-Mobility/dp/B01M1LPPGL/ref=sr_1_1_a_it?ie=UTF8&qid=1492214610&sr=8-1&keywords=keyko%2BAGM&th=1

I am considering such a battery for Emergency jumpstarting once my Northstar AGM starts struggling to start my engine at 50% or less state of charge, but that day is not in the immediate future.

I've got a Li-Ion cpap battery pack that will go several days w/o humidifier, one night with the humidifier. 200WH, roughly 15 AH, and quite small. at one time a 400WH version was available, but the 200WH was the biggest that could be taken on an airplane. there are also 100WH units available.