[CPAP] How Resmed Airsense 10 can have exact time without 3G wireless module?

[Big Guy]

I would guess the battery is like the kind used for cell phones.

I have no idea. All I do know, is that it's most likely under the plate on the bottom of my machine. It's secured in place by some small Phillips head screws.

[channism]

Not very important matter which kind of battery is originally equipped, just in my opinion it would be a kind of coin look battery as Lithium as like as PC main board's one which is for BIOS.
All guys many thanks for replies all I'm helped

[jaswilliams]

There is a lithium button cell under the covers it can be replaced if needed but generally it outlives the unit as it’s power is only used when unplugged

[Dog Slobber]

Here's a picture of ResMed S9 circuit board.

Bottom right you can see the lithium button cell battery. I'm guessing the AS10 uses similar.

   

[Big Guy]

There is a lithium button cell under the covers it can be replaced if needed but generally it outlives the unit as it’s power is only used when unplugged

Good to know, thanks!

[SnoringInOregon]

It's really insane for me that if I purchase from USA distributor and import by myself, the cellular option is working really well (my friend uses it as is) EVEN in Korea with Korean mobile carrier with WCDMA which is SKT who is in service with WCDMA Band 1 (2.1ghz) & LTE...
I can expect its meaning that Resmed & SKT both already had a kind of contract to connect WCDMA service...

There are all sorts of nuances involved with cell phone technology. I'm not familiar with them, so this is just general information.

Generally speaking, it is possible for devices in the vicinity of CDMA towers to obtain the correct time, even without having "service" from a carrier. For example, here is an NTP device that updates itself with the correct time from CDMA towers, no service required:

http://www.endruntechnologies.com/cdma

Maybe your machine really is using CDMA to get the correct time?

[channism]

Now I've conclusion that my machine doesn't have any kind of wireless(aka. 3G/WCDMA/LTE whatever) module or entirely disabled by its embedded original specific firmware, so the machine can have and record the current time only by user's manual setting up thru Clinician mode. Not by Mobile carrier even if it can have correct current time from carrier without permitted usim or service...