Here's an inexpensive little volt meter that you can mount permanently to monitor your battery or charging system. My Honda lawn tractor only has a red light, so I bought one of these to mount in the dash. When it arrives, I'll try it on my Model A to see if it works OK with the ignition system noise.
http://www.ebay.com/itm/161798513692...%3AMEBIDX%3AIT
A battery charging tip using a 12v charger
In a pinch you can actually connect a 12 volt bulb in series with the battery charger cable connected to a 6 volt battery. The bulb will drop the voltage and current to a safe charging level, but the best way is to buy a 6/12 volt 5 or 6 amp battery charger with a meter.
http://www.ebay.com/itm/161798513692...%3AMEBIDX%3AIT
A battery charging tip using a 12v charger
In a pinch you can actually connect a 12 volt bulb in series with the battery charger cable connected to a 6 volt battery. The bulb will drop the voltage and current to a safe charging level, but the best way is to buy a 6/12 volt 5 or 6 amp battery charger with a meter.
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