Powering your CPAP machine is as easy as choosing between a wall outlet and a portable battery. Check out this post if you’d like to learn more about those two options. Now, whether you’ve chosen a lithium-ion or lead-acid battery, there are other factors that should be taken into consideration. Let’s take a deep dive into charging options and battery run time.
Charging Your Battery
Make sure you charge your battery beforehand. Depending on the battery you choose, charging times and methods will vary. The C-100 Battery, for example, can be charged from an AC or DC source.
To charge the C-100 from an AC source, connect the battery using an AC Power Cord to a wall outlet as illustrated in Figure A.
If an AC source is not available, some batteries may be charged from a DC source. Figure B shows how the C-100 battery uses an inverter (purchased separately) to charge from a vehicle’s cigarette lighter power socket. Take into consideration that some batteries may take a long time to charge, which could completely drain out a car battery.
Carefully read the instructions that come with your battery before you charge it.
Factors that Affect Run Time
There are several factors that determine a battery’s run time:
・Using a heated humidifier reduces the battery run time by approximately one half. If you use a heated humidifier, you can save power by using it as a passover humidifier. Fill it with distilled water and turn the humidifier’s power off.
・Use a standard hose instead of a heated hose for optimum operational time.
・The frequency with which you use the battery, taking good care of it, and storing it in a dry and cool place will also help boost your battery’s run time.
・Temperature plays a part in the run time of a battery as well as how long it holds a charge when in storage. In general, the optimum storage and use temperature for a battery is 70°F. When using the battery in warmer conditions, the run time will be reduced.
・The altitude at which the battery is used may also affect its duration. Don’t let that stop you, look for a battery with a longer operational time.
・A high pressure setting will reduce run time. Use the same pressure setting you would normally use and look for a battery that will last long enough.
・Machines that do not have a DC outlet require an inverter that uses additional power to turn the DC output from the battery into AC power that device can use.
・Certain devices, like the ResMed S9 Series, need a converter to change the DC power from a 12V input to a 24V output.
There are many ways to take your sleep therapy with you. Make sure you plan ahead of time before you travel or be prepared for a power outage. Choose the machine and power source that best fits your lifestyle. If you need additional information, please chat with a CPAP.com expert or call 1.800.356.5221. We’re here to help.