You can use a car battery to power some cpap machines.
Cpap car battery.
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Purchase a cpap battery kit available from amazon and many other on line sites.
A 12 volt car battery can certainly power a cpap machine.
Most backup cpap batteries have a power rating below 100w.
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A deep cycle battery uses a chemical reaction to generate electricity and are heavy and bulky.
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They re priced from around 279 upwards and can run for up to 30 hours before needing a recharge.
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The duration efficiency and long term damage to your car battery leaves much to be desired however.
Plug into your car battery however you would have to run the car all night or risk depleting your battery.
But they have the advantage of being able to deliver a charge for longer than a lithium ion battery.
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Portable cpap battery packs allow you to be sure that your cpap machine never runs out of power.
In order to connect a cpap machine to a deep cycle battery one should look into using a ac power inverter or a dc cable with a cigarette lighter.
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Car batteries are lead acid deep cycle batteries that have much larger capacities than a lithium ion battery.
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For example if your battery s power capacity is 50w and your cpap requires 55w then the battery cannot power your cpap.
There can be various scenarios where a cpap battery backup can prove to be a lifesaver.
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This means that the best option you have is buying one closer to or above the 100w power rating.
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A 50 amp hour equivalent car battery should be able to power a 2 5 amp cpap for 6 hours and a 5 amp cpap for 2 63 hours with an inverter.
How long can a car battery power a cpap machine.
Battery backups are useful during electrical outages especially if they last for days such as after a large storm.