NOKIA smart phone battery system
Few days ago, I have soldered the DC15V 4A output to possitive wire and negative wire attached to the NOKIA cell phone battery circuit board, and then turned the power on.
Then measured it with a voltmeter. There was DC15V at both possitive and negative wire connections as I expected, however no current whatsoever at battery end. I think it’s much more complex than what it appears to be.
The Nokia cell phone battery system checks that cells be present and that there be a handshake between all components, before allowing power to the endl.
The smart battery is same as a small computer system. The following is some very interesting reading about the SMB bus and its implications. You may probably interested in it
What I’ll try next is to get rid of the circuit board within the Nokia smart cell phone battery and all other connections. Then also I’ll apply the DC current from 15V 4A adapter to smart samsung phone battery terminals 1 and 7 as suggested.
You can replace each group of cell with a resistance of 100K ohms, connect the positive to the terminal 1 and negative to the terminal 7. We’ll see if the four resistors will replace the smart Motorola phone battery cells.