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Old 13-01-2009, 15:26   #22
mattylad
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Re: solar 12v battery chargers

Quote:
Originally Posted by Retlaw View Post
Thats if your testing the battery whilst it is still connected to the car electrics. My suggestion was to disconnect the + terminal and connect a voltmeter between the + terminal and the + battery post, that will show if there anything using juice when the ignition is off.

Retlaw.
Yes and to determine if juice is being used, you need to use an "ammeter".
It measures amps/current.

Whereas a Voltmeter is used to measure voltage and they do not like it when you try and draw current through them.

A Multimeter would have both functions on.

Sorry to be pedantic about which instrument is used but it's best not to risk damaging one.
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