Posted by mkirsch on December 17, 2010 at 05:16:24 from (64.80.108.56):
In Reply to: Jumping 6v? posted by Faster346 on December 16, 2010 at 07:45:59:
JohnT,
I don't care how many Amps the battery is "capable of." Physics still rules the day. Physics was my best subject through high school and college, and I've dabbled with electrical and electronics for almost 20 years since.
Even if the battery was capable of a MILLION Amps, it's only going to flow what it's going to flow based on the difference in voltage between the 12V source and the 6V battery.
You simply can't "force" current just because the source is capable of producing that much current. Current flow is based on what's in the circuit.
If applying 12V to a 6V battery caused excessive current flow, you would see these commercial chargers burning up.
Check the open circuit voltage on a battery charger in "6V fast charge" mode sometime. Put your meter across the clips.
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