how to make a around 12 volt rechargable pack using nokia battery or sony ericson battery?
I needed a 12v battery to powered my RC toy car. But then li-po battery pack is too expensive for me,
thus i was thinking if i could use nokia battery which is li-ion i can join them in series to increase the voltage and parallel to increases the current output of the pack.
the problem is how should i do that while i cant do anything with the battery that i have ...