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08-02-2020, 05:44 PM
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#1
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Junior Member
Join Date: Aug 2020
Posts: 2
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Batteries won't hold a charge
Bought my camper used, so as far as I'm aware, the batteries are about 4 years old. I've got two NAPA batteries wired in parallel. The driver-side battery has two bad cells. I tested both batteries with a hydrometer and the first and fourth of six cells registered almost nothing on the driver-side. The output seems pretty weak and just drops off after a short amount of time. Usually around two hours after disconnecting shore power, they can keep the lights on, but just don't have enough juice to power the tongue jack or the slides. Is there anything I can do to salvage these, or am I looking at just forking over the money for a new battery?
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08-02-2020, 05:50 PM
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#2
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Senior Member
Join Date: May 2005
Location: Carlos, Texas
Posts: 1,746
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Naaaa. You'll want to replace both at the same time. The older one will take life out of the new on. Make sure all the connections are good and clean. And make sure you get RV rated batteries and I always replace with the largest capacity that will fit.
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08-02-2020, 05:54 PM
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#3
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Senior Member
Join Date: Dec 2006
Location: Foxboro Ma.
Posts: 1,096
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replace them both with NEW , dont let the new battery freeze or go below 50% CHARGE. You should get 5 years + out of them if you get good battery and your charger is a 4 stage unit.
__________________
2015 42' Redwood RL38 Morryde IS , disk brakes, 1920W of solar with Victron everything,5 Battleborn, 2024 GMC DRW 3500HD ,60 gallons of fuel in the bed,Hensley BD5 air ride hitch.
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08-02-2020, 09:06 PM
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#4
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Senior Member
Outdoors RV Owners Club
Join Date: Oct 2014
Posts: 3,539
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Replace with 2 6 volts from Costco. 20% more battery for the same or less money. If they are too tall for your current battery boxes Batteries+ has Noco 6 volt boxes with straps for $15.
__________________
2020 F28 RKS Titanium
2017 Creekside 23 RBS Sold
2016 F250 Super Crew XLT Overworked
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08-03-2020, 04:28 AM
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#5
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Senior Member
Join Date: Jul 2013
Location: North Ridgeville, OH
Posts: 2,455
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The two Interstate house batteries on our Bay Star have been performing poorly, and I decided to switch to two 6 volt batteries. I looked at the batteries at Costco, but recent reviews have been rather poor. So I opted to go with two Duracell batteries:
https://www.batteriesplus.com/produc...cle/6/sligc115
I just installed them yesterday, so this is just a bit of information and not a recommendation. But, if you read up on batteries for RVs, you'll see that most folks prefer going with 6 volt batteries. Depending on how you camp and if you camp a lot without electrical hookups, you may want to consider eventually having four six volt batteries if you need the additional capacity.
Good luck and keep 'em charged!
__________________
Retired but busier than ever!
2012 Newmar Bay Star 3302
5 Star Tune, SumoSprings, Roadmaster Steering Stabilizer, Blue Ox Avail
Brake Buddy, 2015 Chevy Malibu
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08-03-2020, 04:38 AM
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#6
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Senior Member
Join Date: Feb 2017
Location: Full Timing. When I park I'm home
Posts: 1,369
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Replace them both.
__________________
2004 Volvo, 2009 smart car
2008 Hitch Hiker Champagne
Full timing January 2010
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08-03-2020, 04:54 AM
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#7
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Senior Member
Join Date: Jul 2015
Location: Watertown NY USA
Posts: 6,531
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I replaced my two 6 Volt batteries last week. The batteries were NAPA 8144 GC 2 batteries which were installed May of 2015. I replaced the batteries with the same exact batteries. I've been happy with the way the batteries served me for the past five and one half seasons.
I had one bad cell in one battery.
Lynn
__________________
2002 Fleetwood Storm 30H on Workhorse P32 chassis 8.1 gas.
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08-03-2020, 06:35 AM
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#8
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Senior Member
Join Date: Aug 2017
Posts: 2,106
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Replace them both. When you put your rv in storage or not in use for a long period of time , fully charge the batteries , then disconnect them. You will then easily get 5+ yrs out of them. If you go with AGM batteries, the life expectancy will be even longer.
__________________
1993 Tiffin Allegro Bay 32'
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08-03-2020, 06:35 AM
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#9
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,452
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Welcome to the forum:
Beer and Batteries are only rented, you never really buy them.
Don't make troubles for yourself. Take many pictures and print them out. Replace the batteries using the pictures and don't get fooled by wire colors. Use the pictures.
Once you have things really clean and shiny after following the battery wires wherever they go take voltage measurements and write those down on the pictures you print out. Put the pictures in a plastic sheet protector or laminate them.
There will be a test on some dark and rainy night so keep the pictures handy.
Cheers.
__________________
Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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08-03-2020, 01:18 PM
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#10
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Nov 2018
Posts: 2,521
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He's dead, Jim.
Four years is a bit young but odds are they haven't been loved. The only value these have now is for a core/trade in.
Mark B.
Albuquerque, NM
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08-04-2020, 07:54 AM
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#11
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,452
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Most rv batteries are murdered, few are allowed to live a full life.
I have seen them last 8-9 years but that is incredibly exceptional and require lots of love.
__________________
Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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