czwalga00gt
New Member
So I race rally cars, we have intercoms in our helmets. The new intercom I have is powered off of a 9v battery. This is due to the intercom picking up interference from the noisy alternator if it's powered directly.
The intercom CAN be powered by the 12v+ from the car; just has more noise in the system. My question is if I install a 9v rechargeable in the system. Then wire the 12vdc from the car on a switch in parallel with the 9v. Would this charge the battery when we're not using the intercoms? Or is there more to charging a battery than that.
The intercom CAN be powered by the 12v+ from the car; just has more noise in the system. My question is if I install a 9v rechargeable in the system. Then wire the 12vdc from the car on a switch in parallel with the 9v. Would this charge the battery when we're not using the intercoms? Or is there more to charging a battery than that.