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Old 08-07-2019, 08:36 AM   #1
Winnie-Wise
 
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12v Gauge - handy/cheap little gadget?

We often want to know what the battery level is but not spend a lot of time opening the covers, etc. so I thought this might look good to some of you old hats who remember what we thought of lights on the dash!
I keep one of these in all my vehicles, just as a way to test things without having to open the hood! On RV, they can do a quick check of coach and chassi batteries if you have a lighter type plug on each.
https://www.ebay.com/itm/Mini-Car-LC...QAAOSw6ZRdSPPF
I do not leave them plugged in full time as I feel that might tend to shorten the life but just keep it handy fro quick checks like when the engine seems a little slow on starting.
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Old 08-07-2019, 09:15 AM   #2
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I think they're useful, for checking charge voltage while the engine is running, and if you plug them in before you start the engine they'll give you a reasonable estimate of your resting voltage. No Ah display, which would be a better SoC indicator, but better than nothing. Simple, and inexpensive.

They will probably be fine left in place, but would become another parasitic draw after a while. I've got one plugged into our 3rd vehicle that we rarely use, but that I have on a battery maintainer/charger, and it's been plugged in for quite a while.
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Old 08-16-2019, 08:19 PM   #3
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Link now leads to a car headlight kit.
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Old Yesterday, 06:36 AM   #4
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Guess the volt meters sold out.
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Old Yesterday, 09:34 AM   #5
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There are a bunch on eBay, maybe Morich can tell us if it's one of these:

https://www.ebay.com/sch/i.html?_fro...meter&_sacat=0
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Old Yesterday, 09:48 AM   #6
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I replaced the bad link in the OP's post.
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