Is it ok to updating the firmware @ 90% of battery capacity?
 

It is said that the battery should be first charged before doing an update.

But what is the reason for that?

Is it:
1. To prevent the device from an unfinished firmware update in case of a to low battery

ir is it also
2. The OS saves the value for 100 % battery capacity somewhere and so, can't be fully loaded to 100 % again, when the update
was done at 90 % battery capacity, setting the 90 % battery capacity to maximum capacity. In other words 90 % gets the new 100 % value.


Is 2 possible or is battery management done without the support of the OS?

Re: Is it ok to updating the firmware @ 90% of battery capacity?
 

I don't know the answer to this exact question, but I do know the battery management is done in software, and that if you brick the device, with a dead battery, you can not charge the battery, nor reflash the device, without an extra battery.

Re: Is it ok to updating the firmware @ 90% of battery capacity?
 

The case here is 1, and the battery info (full charge etc) is stored in a chip in the battery AFAIK

Re: Is it ok to updating the firmware @ 90% of battery capacity?
 

That seems to make the most sense as well, or things could get really crazy with multiple batteries.

Re: Is it ok to updating the firmware @ 90% of battery capacity?
 

The average required battery capacity is anything more than 50% for flashing the firmware.

Re: Is it ok to updating the firmware @ 90% of battery capacity?
 

Number 1, that's why it is recommended to calibrate the battery at least one time per month.

Re: Is it ok to updating the firmware @ 90% of battery capacity?
 

If the battery meter is like on N8x0, then it's not very accurate except with a fresh battery. Basically, if you charge it to full you'll know it's full.

Re: Is it ok to updating the firmware @ 90% of battery capacity?
 

Thank's a lot for answering my question.