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Unread 07-04-2013, 20:43
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Ether Ether is offline
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Re: DVM on sale at Harbor Freight $3.99

Quote:
Originally Posted by Billfred View Post
At one point, we lopped the leads off one like these and put on an Anderson connector. I'm not saying it's remotely adequate when held up to a CBA or Battery Beak, but it's better than nothing.
Hey, pick up an old sealed-beam incandescent headlight at an auto junkyard and you got yourself a reasonable battery tester.

Hook the headlight (30 to 36 watts) up to a freshly-charged battery and leave it on for 2 hours. If the voltage across the battery after 2 hours (with the headlight still on) is less than 12 volts, you've got a weak battery.