Camping with the cub scouts? resmed airsense and power tool batteries?

I haven't been camping since I got my machine 3 years ago. I've read a bunch of battery threads and found some good info, although a bit overwhelming.

I'm fairly invested in the Milwaukee 18v lineup. can these batteries? 5AH-12AH be used to power my cpap for a few nights?

No.

Jake00 wrote: ↑

Sun Oct 28, 2018 7:14 pm

I haven't been camping since I got my machine 3 years ago. I've read a bunch of battery threads and found some good info, although a bit overwhelming.

I'm fairly invested in the Milwaukee 18v lineup. can these batteries? 5AH-12AH be used to power my cpap for a few nights?

Well, if you rigged up something to connect them to a power supply... theoretically.

The Resmed converter takes 12-24 volts in... and your batteries fall in that range.

Those power tool batteries are pricey.
Add in converters, and it might not be practical.

Jake00 wrote: ↑

Sun Oct 28, 2018 7:14 pm

I haven't been camping since I got my machine 3 years ago. I've read a bunch of battery threads and found some good info, although a bit overwhelming.

I'm fairly invested in the Milwaukee 18v lineup. can these batteries? 5AH-12AH be used to power my cpap for a few nights?

I don't see why not. However, there are a few issues to deal with. First, the electrical connection will need a bit of creativity. You may find a socket that can be adapted (like the battery holder) and maybe the m18 power source which has USB chargers and some DC output will work. Or DIY.

The Resmed DC/DC converter specs say something like 11 to 26 volts but I remember someone saying it doesn't properly handle the middle of the range (i.e. its designed for 12 OR 24). It had to do with thinking 18 volts was an under-voltage situation. Definitely try this out for a full night before the trip.

The big Milwaukee 9ah battery is something like 160 watt-hours which should be more than enough to run a full night, but the smaller battery (about 90 watt-hours?) might be marginal. The third party batteries should work in theory, but who knows? Again, try it out.

The load (without humidity or heated hose) is pretty modest compared to power tools, so I don''t see a problem in that area, other than the physical connection.

If there is a simple path here, that would be awesome! But, my hunch is its more hassle than its worth, so the real value may be the pride of DIY!

Yes, makers RULE!
Sometimes it is not practical--but the chase may exceed the prey.

I agree I think those batteries would work. You could use with a DIY adapter but easier with a pre-built unit given the center pin voltage requirement. If I were to use them I would connect the dc/dc converter to a usb adapter for the battery such as this:

https://www.amazon.com/Power-Source-Mil ... 01C3FRFO8/

Just open it and wire directly to the primaries for the battery. You could even leave the usb port active for your phone. I have sacrificed something similar to use DeWalt 20V max batteries for floundering lights.

Good luck and post pics if you do it.

I bought this https://www.amazon.com/gp/product/B07RF ... UTF8&psc=1 and plugged it into a milwaukee 18v battery via this
https://www.homedepot.com/p/Milwaukee-M ... lsrc=aw.ds

and nothing... Maybe I need to convert the 18v to 12?

I've also got some 12V Milwaukee stuff, and the 12V power source. Same results. When I plug in, the green light on top of the cpap blinks once.

y'all mean the cord that says "24 VOLTS ONLY! DO NOT USE WITH 12 VOLTS"?

This video mentions that the resmed needs a special connector with a "chip" in it to recognize a power source...
Is this adapter available? or am I stuck buying the DC adapter from resmed?
https://www.youtube.com/watch?v=HZne40RJHgw

I'm not an electrician, but years ago I got a small power inverter that plugged into a car's cigarette lighter. I got a lighter socket from Napa and wired it to a deep cycle battery. Not a good idea for backpacking, but great if you're car camping and going to be in place for a few days. If you could power that off a drill battery, connecting should be as easy as alligator clips at the battery end.

But I can't speak to Resmed's copy protection.

The blue smoke generated by expensive disasters--is it somehow better than inexpensive smoke?

ResMed machines require that the 12 volt or whatever volt battery juice output to be converted to 24 volts for the ResMed machine to work. If your machine isn't getting 24 volts...it won't work.

ResMed makes a nice little pricey adapter/converter just for this purpose.
There are some after market adapters/converters that say they will also work but I hear they are hit and miss as to actually working well.

Ok, I am not sure where to start.

It appears that you are trying to use a Milwaukee battery to USB adaptor to power your Resmed Airsense 10.

The Milwaukee battery may be 18v (it actually is ~20v when fully charged) and this may be plenty of voltage for you Airsense 10 but USB is only 5v, the adaptor is actually reducing the voltage from18-20v to 5v.

My next question is how you are going from the USB to your Airsense, do you have an adaptor? If yes, which one, what are it's specs? The Resmed 12v to 24v adaptor can handle 12v-20v input and output 24v for your Airsense 10 but there is no mention of what you are using to make this connection.

If I was going to try to do this, I would tear that Milwaukee battery to USB adaptor apart and remove the voltage regulator chip and change the output to something that I could connect into. I would then add a cigarette 12v socket to the adaptor and plug a Resmed 12v to 24v adaptor into it. If that worked I would calculate my power needs and make modify enough adaptors to connect to that number of battery packs and wire those adaptors in PARALLEL (not series) to a single 12v socket.