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Posts: 456 | Thanked: 1,580 times | Joined on Dec 2009
#9
Actually, you do get access to the USB connector via these pads.
I managed to charge the battery having +5V and GND connected to a 5V power source.


Please be aware that this is highly experimental and you do this all at your own risk!
By messing with your device in this way you'll for sure loose warranty!
Furthermore, you may damage or even destroy your device!



Having said that, lets move on:

In order for the charging to begin +Data and -Data need to be connected (via some resistor ~2.5 Ohm) prior to connecting the power source.
Else simply nothing happens.

Note: I measured whats going on with the default power supply on +Data and -Data and it showed a resistance of 2.5 Ohm.
I used a 2.2 Ohm resistor and also tried to simply shorten +Data and -Data.
In both cases the battery started charging after connecting the power source.

I attached an image of the pins I used.
Edit: I added my stuff in orange color.
GND of course still is the same.

Please note that:
Originally Posted by joerg_rw
...
Battery minus is NOT GND! Don't use it like that
...
And also have a look at the rest of his post on the second page for much more useful information!
Attached Images
 
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Last edited by Wonko; 2011-05-29 at 14:25.
 

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