help with 9ah battery connection to CPAP

Hi Fellow Oxygen-Challenged Night Breathers,

I'm going camping and recently was happy to learn that I can buy a 9AH car battery to give me a night's sleep with my CPAP. However, I'm not too mechanical, so I if I head to Walmart to buy the battery, how will I connect the DC charger to the 9AH battery.

Thanks for your help!

Tikigal

tikigal wrote:Hi Fellow Oxygen-Challenged Night Breathers,

I'm going camping and recently was happy to learn that I can buy a 9AH car battery to give me a night's sleep with my CPAP. However, I'm not too mechanical, so I if I head to Walmart to buy the battery, how will I connect the DC charger to the 9AH battery.

Thanks for your help!

Tikigal

1. Car Batteries are larger than 9AH, unless you are into model toy cars. I wouldn't likely last more than 2 hours if that.

2. We don't know what XPAP you use, your pressure or how long you want to use it.

Probably will need to know more things to give you a correct answer. CaptLok in the search bar would be a good place to get ideas. Jim

tikigal wrote:Hi Fellow Oxygen-Challenged Night Breathers,

I'm going camping and recently was happy to learn that I can buy a 9AH car battery to give me a night's sleep with my CPAP. However, I'm not too mechanical, so I if I head to Walmart to buy the battery, how will I connect the DC charger to the 9AH battery.

Thanks for your help!

Tikigal

It would help a lot if you told us the type of cpap you have (brand/model). Also, the type of camping (car camping, mountain climbing, etc). Length of time, and a rough budget. 8 Amp-hours is the size of a small Lithium pack good for one night, but for longer trips, you can get a 35 AH deep cycle or bigger. Refer to the link in my signature for more than you'll ever want to know.

xxyzx wrote:you can buy a 9AH battery
but
it wont last the night on an xpap
it lasts about 20 minutes keeping my pc going when we lose power

chargign it depends on the battery and packaging and connectors

check with the maker of your device for proper battery and charging and connection to your xpap

Nonsense. The average use for a cpap at pressure 10 is 4 to 5 Amp-hours at 12 volts. Many people use a 8 Amp-hour Lithium pack and report getting 1 or 2 nights. At lower pressure you might get 3 nights, though I wouldn't push a lead-acid battery that far. This of course assumes no humidifier, but for many campers this is not a problem since humidity generally goes up at night outdoors. (Right now I'm off-grid and don't have a humidifier with me.) Its also strongly recommended to use a direct DC connection rather than inverter, but even with inverter one would probably make it through a night on 9 AH.

Most of the battery packs offered by cpap companies, such as the ResMed power station, are 8 Amp-hours or less. (However, at over $600 its about the least bang-for-the-buck you can find!)

As I've mentioned in my guides there are small AGM batteries that may be useful for special applications, but the 35 AH size, at $65, is the best for many uses.

You should stick to giving advise on matters you actually know about, if any.

stupidity wrote:you can buy a 9AH battery
it lasts about 20 minutes keeping my pc going when we lose power

Because *THAT'S* relevant....

xxyzx wrote:typical libtard bully response

What are you, 12 years old?

xxyzx wrote:i said he needed to check with the manufacturer

That sounds like a good idea. Let's look at the ResMed Battery guide
http://www.resmed.com/us/dam/documents/ ... lo_eng.pdf
It says that a for the S9 and Air 10 models, which includes about a third of the cpaps sold recently, at a pressure 10, a 7 Amp-hour battery is good for one night with a 50% safety margin. I can confirm from long experience that the Respironics 560 is roughly the same.

xxyzx wrote:i know the AH of the 12 volt battery i have and how long it lasts
i would not risk my health expecting it to work long enough on a camping trip
when it can only keep the pc going for 20 minutes

what you do for yourself is of little concern to anyone on this forum. Please stop giving bad advice to others.

xxyzx wrote:

CapnLoki wrote:

xxyzx wrote:i said he needed to check with the manufacturer

That sounds like a good idea. Let's look at the ResMed Battery guide
http://www.resmed.com/us/dam/documents/ ... lo_eng.pdf
It says that a for the S9 and Air 10 models, which includes about a third of the cpaps sold recently, at a pressure 10, a 7 Amp-hour battery is good for one night with a 50% safety margin. I can confirm from long experience that the Respironics 560 is roughly the same.

===========

my advice is solid
you can take it to the bank

i said to see the manufacturers requirements

if you want to take needless risks that is your right
but you should not encourage others to do that

for me i am risk averse
and will keep telling people to be careful

The OP has not told us what make/model is used, but I supplied the primary manufacturer's document that shows that you're probably wrong. If you're a real engineer (as opposed to a Lionel engineer), you would know that your "you can take it to the bank" is a bit hollow. I've found that whenever someone says "trust me" they have no idea what they're talking about.

You keep claiming that your advise is 100% correct, but in this case anyone can see that its totally bogus. You did the same thing last month telling someone it was impossible to use a cpap on a rafting trip and they should give up any thought of doing it. In fact, we have several users that have done extensive white water rafting with cpaps on battery power. I live for months at a time on a boat using battery power, charged with solar. Its just a matter of engineering.

I use a 12 volt marine battery to power my cpap and can get 3 nights easily on one charge. Capt Loki is our resident EXPERT on battery use here on the forum believe him, not xyzz.
Good luck and have fun camping
Nan

nanwilson wrote:I use a 12 volt marine battery to power my cpap and can get 3 nights easily on one charge. Capt Loki is our resident EXPERT on battery use here on the forum believe him, not xyzz.
Good luck and have fun camping
Nan

xxyzx = the voice of ignorance.

palerider wrote: xxyzx = the voice of ignorance.

But still, the smartest person ever.

poppi2 wrote:

palerider wrote: xxyzx = the voice of ignorance.

But still, the smartest person ever.

In the WORRRRRRRRLLLLLLLLLLLDDDDDDDDDDDDD!

If you don't believe it, just ask him.

tikigal wrote:Hi Fellow Oxygen-Challenged Night Breathers,

I'm going camping and recently was happy to learn that I can buy a 9AH car battery to give me a night's sleep with my CPAP. However, I'm not too mechanical, so I if I head to Walmart to buy the battery, how will I connect the DC charger to the 9AH battery.

Thanks for your help!

Tikigal

Hi TikiGal,
We're still here, hoping to help. Please excuse the little detour, but rest assured there are solutions for camping with a cpap. I'm writing this as penance for letting this thread devolve. With more information we can give you a tailored solution, but without that here's a few hints.

If you want a Walmart, they probably have in stock a Marine Deep Cycle battery. It MUST say deep cycle because you don't want a auto starting battery. It will be something like 80 Amp-hours, and weigh 60 pounds. and cost about $80. It would run a cpap for a week or longer, without humidity. Unfortunately this is traditional flooded battery, which is quite functional and cost effective, but comes with certain risks.

For this reason I recommend AGM batteries, originally designed for jet fighters, so they are safe upside-down, etc. A common size is U1, used in mobility scooters; they are 35 Amp-hours, 24 pounds, and cost about $65. You can find them online at Amazon, Walmart, etc. AGM batteries come in many sizes: 7 AH are used in battery power supplies, 18 AH are used in jump starters, and you can find larger 100 AH batteries. If you only need one night, the 7AH probably works. A rafter use 20 AH batteries for 2-3 day rafting trips; the 35 AH are a good "bang-for-the-buck" solution because they have enough power to run a humidifier if you have a power failure at home.

AGMs can be charged with regular car chargers; I like the BatteryTender line of small, gentle float chargers. I've seen them at Costco, and they can certainly be had at Amazon. They come with most of the wires you need.

Depending on your cpap, there are different ways to connect. Philips Respironics and a few other brands use 12V and you can get a "cigarette lighter" plug cord cheaply. ResMed requires a special adapter, $85, it all comes with a cigarette plug. (You'll probably want a cigarette socket cord.) I strongly recommend a proper setup, don't go cheap with alligator clips.

All of this is explained at the link in my signature. Please come back if you have any questions.