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Old 05-14-2016, 02:26 PM   #1
2 Rivet Member
Bend , Oregon
Join Date: Aug 2010
Posts: 73
12V battery health

What's the appropriate way to test a 3-4 year old 12V battery to see if it needs replacement? Not having any problems with it but would like to know its 'health'. Use a hydrometer?

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Old 05-14-2016, 02:36 PM   #2
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2015 23' FB Flying Cloud
Bend , Oregon
Join Date: Nov 2015
Posts: 50
Battery reliability

Take it to an Interstate dealer and they will check and confirm for little or no cost to you. A hygrometer is about $8 and your batteries should never go below 11.5 v.

Robere & Jacqueline
with pups Ella (the miniature poodle)
and Tibet (the Lhasa Apso)
2015 23' FB Flying Cloud
2016 Chev Silverado LT Crew
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Old 05-15-2016, 11:32 AM   #3
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2006 23' Safari SE
Lexington , Kentucky
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If the battery is not a sealed battery you can use a hydrometer. The ones in local parts stores are small and difficult to read. I got a nice one from Amazon for $10 a couple years ago. You used to be able to buy these anywhere but now they seem to have those pencil sized ones. Bigger is better, I say. The hydrometer will tell you if you have a dead or weak cell and the state of the other cells too.

If the battery is sealed you can't get a hydrometer in to check the specific gravity. At Harbor Freight I got a battery load tester for $22. I've had it for about a year, check my batteries periodically. It's cheap but does the job. There have been some complaints about it wearing out in a short time but for $22 and over a year now, no complaints from me

Rich & Yvonne
2006 Safari SE -Dora-
2004 4Runner SE

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