Did a dual cell conversion along with a pcb swap this morning with a clone board. I used batteries out of two zipzaps and installed them according to the instructions found in this forum. Also modified the controller to direct charge the batteries. Problem is that the run time is near zero. My voltage starts out at 2.5 to 2.6 volts at the charging contacts. When I run the car, the voltage almost instantly drops to around 0.9 volts. and the car stops running. As soon as I stop the voltage increases back to 2.5. I direct charge the car for about 2 to 2.5 minutes. Any ideas appreciated.
It sounds as if you may have fried your batteries you should take them out and desolder everything and charge them in the car independently and see
if they both hold a charge the symptoms you explained normally come from a
dead cell and i know the stock ones heat up very fast i would recomend a 30 watt soldering iron and silver bering solder to make this work i would also suggest tabed cells
I took both my batteries out this morning and put them in another zip. They both worked and lasted fine. Am wondering if the two AAA batteries are fully charging the batteries.
I think that the 2 batteries in your charger is not enough to charge the 2 cells you have in the car. If my math is not off,, you are using 3.0 volts from your controller to charge a 2.4 volt battery in the car. The difference in voltage is not enough to get a good charge. You need a 3 or 4 battery charger.
wow im sorry for u. I hope that doesnt happen to mine...i have no clue
, soon to be 
, 
and 
, and a dual batt. mod with 2.8 or 2.6 motor
Linear Mode
