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 ...

Yes you can do that you have to search for two 5v batteries and make a series connection as shown in the picture below
Beduk7 years ago
I dont think you can do that.The mobile phone has a special device to charge the battery and use its power.If you remove the part from the cellphone things would work.