tablet and smartphones - do they have cmos/pram batteries or real time clocks

yoshishardware

Honorable
May 17, 2013
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10,510
Hi,

I know laptops and desktops have them. If tablets and smartphones are basically computers also, do they have such batteries / circuits in them too?

I looked at alot of tear down reports and did not find them, but wasn't sure if that's because they just don't report such components.

thanks,
Yoshi
 

sorry if i wasn't clear - I wanted to know if they have cmos batteries, pram batteries or real time clock chips/circuits. thanks.
 

In most phones and tablets, everything runs off the main (and usually only) battery.

And yes, they have a RTC - you can turn them off (completely off, not just standby), turn them on somewhere where there is no WiFi/cell and they will still have relatively accurate time.