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Unread 17-12-2010, 21:46
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Re: Warming up the batteries

Quote:
Originally Posted by Don Rotolo View Post
Instead, take about 10 feet of #10 wire (or 8 feet of #12), which should be about 1 Ohm. Measure the length of wire with an Ohmmeter (be sure to comensate for the resistance of the meter's test leads) to verify about 1.0 Ohms. (A high-wattage 1 Ohm resistor (25 Watts capacity) will do as well)
I think you're off by a factor of 100, Don. Isn't ten feet of #10 wire actually more like 10 milliohms?

(A single ohm would only draw about 12 amps, which isn't nearly enough to give useful information about the health of a battery after just fifteen seconds.)