Hello, I'm building an externial battery pack for a metal detector. At present it uses a stick type battery pack with 8 AA batteries, they are 1.5 volts and mounted in series giving the pack 12 volts of power. These 8 batteries will operate the detector for about 13 to 15 hours.
In the front of the pack there is one capacitor mounted between the terminal that the battery touches and the terminal that is in the metal detector. I think it is the positive side the other side (negitive) has no capacitor.
I looking for the value of the capacitor and the reason why they use a capacitor. There is no value printed on the capacitor.
I do know that a rechargeable pack only has 9.6 volts of power and the AA pack has 12 volts so I would think that any power from 9.6 to 12 volt should be good.
I also know that other detector owners would rather use the the AA pack and not the rechargeable
because the AA lasts longer.
If I build a battery pack I would like to add a capacitor so it works like the factory pack.