Battery chargers

michael a

michael a

Senior Member
This is something I have just thought about here lately What is the difference between 6 and 12 volt battery chargers? After all isn't 10 amps or 2 amps still the same going into 6 or 12 volt batteries?

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The voltage is the "push" behind the amps. You can't charge a 12 volt battery with a 6 volt charger. The voltage has to be higher then the battery voltage in order to charge it. Now, if you try to charge a 6 volt battery with a 12 volt charger, you going to "push" more amps into the battery and overheat it.
 
10 amps and 2 amps is the same but the wattage being fed to the battery on a 6 volt battery is half that of a 12 volt. And that applies to any amperage charger.

A 6 volt charger, by design, limits the voltage to a 6 volt battery to around 6.5 Volts! A 12 volt charger, by design, limits voltage to around 14 volts give or take a bit on both voltages. Watts law power formula is P = I x E So, at 6.5 volts and 2 amps a 6 volt battery is being fed 13 watts and a 12 volt battery at 2 amps is being fed 28 watts (approximately) Chargers are designed for the battery voltage they are charging. Most modern chargers do not even consider 6 volt batteries any more. My 6 Volt charger, I found at a flea market for
$5 bucks.
 
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