Watch battery need help

[Maxximum Attack]

I was trying a dual cell watch battery mod. But when i put in the two batteries the motor starts running by itself. Why?

[crazydave]

I was trying a dual cell watch battery mod. But when i put in the two batteries the motor starts running by itself. Why?

Your shorting out on something. Wrap dem batteries in tape, so they don't ground everything they touch.

[Maxximum Attack]

ok i taped them and now no juice

[crazydave]

Hmmm, that's odd.

Without seeing it I can only can make assumptions, but I have to assume you put some tape where it shouldn't be.

When I said wrap them in tape, I meant just the edges, leaving the ends exposed, but now I realize I have no idea how your putting these in your car, so I'm not sure what I'm talking about, but if your car was running constant before, it definately was shorting out somewhere.

[dabigpig]

ummm either when you taped them the wires broke from the batt's to the pcb or you're shorting the batt's together... that' all i can think of w/o opening it up myself

[Maxximum Attack]

ok i think the batteries are being separated from the anti-roll thingie. So I'll have to grind that off tomorrow.

Thanx guys I'll let u kno if it works.

[Maxximum Attack]

This dual cell does not make a differance . The car is SLOWER than my single 50mAh cell.
Help

[crazydave]

This dual cell does not make a differance . The car is SLOWER than my single 50mAh cell.
Help

I used to wonder why an RC car with 1.5v Alkalines was slower than an RC car running 1.2v NiCds. Then I learned of a battery's internal resistance. Rechargeables have a lower internal resistance, and allow more current to flow. Figure a watch battery is designed to slowly discharge it's juice over a long period of time.