Replace battery in suspend

Joerg Reisenweber joerg at
Sat May 9 16:25:08 CEST 2009

Am Sa  9. Mai 2009 schrieb Christian Rüb:
> Hi,
> is it possible to do the following:
>  * power off GSM
>  * suspend
>  * plug external USB power supply (can do 100,500 and 1000mA)
>  * open device and exchange battery
>  * resume again
>  * power on GSM
>  * (optional) unplug USB power supply
> I do not have a second battery (yet) but this scenario might occur while GPS 
> tracking and not having the possibility to charge. I already have this 
> external USB battery but it will not be enough to cover all the time I need 
> my Frerunner running.   
> I read somewhere that the GSM alway gets its power directly from the 
> battery, thus my interest in turning it off before suspending. Can this work 
> or might this even break anything?  

It's perfectly safe to swap battery while hooked to >= 500mA USB-power (GTA02 
only! Never do this on GTA01 unless you know exactly what you're doing).
Your considerations regarding GSM are correct, it needs a re-init after new 
bat inserted. Alas this seems to be a broken function in SHR atm.

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