Warning. Don't remove battery with usb power

joerg joerg.twinklephone at gmx.de
Tue Mar 4 11:15:49 CET 2008

Am Di  4. März 2008 schrieb Tilman Baumann:
> Ben Wilson wrote:
> > Hey Nick,
> > 
> > I've not looked at the electronics inside the neo myself but the sound
> > is typical in the electronics world of a switchmode power supply under 
> > grate strain.
> The reason is a bit more banal. (AFAIK)
> The scream has just the frequency how much the main cpu can boot and 
> detect that there is no battery and reset. (something like that)
> Probably not a good thing for the components, but not a result of any 
> stress to the power drivers.

My idea: 50606 PMU is switching rapidly between BATT_VERY_LOW and BAT_OVERVOLT 
state, and btw powers on and of the whole NEO hw. Not verified.

> But maybe it results in stress for them...
> Don't know. Better avoid it. :)



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