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Old 12-30-2015, 12:22 PM   #1
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Battery Dead

Bought new Kirkland series 27 deep cycle RV battery from Costco after discovering house battery not holding charge. Installed new battery, but shut off all power with cut-off switch. One month later returned to RV to find battery flat dead. Temp hovering around -5 celcious and above. Shouldn't battery hold charge this long? Checked after turning main shut off switch to ensure all sensors were off. No current draw. Go figure.
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Old 12-30-2015, 01:02 PM   #2
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Rarely does the battery cut off switch disconnect 100% of your users. In most trailers, you'll find your alarms still powered even with the cut off switch disconnected. Current draws will be very small but continuous.
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Old 12-30-2015, 01:11 PM   #3
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Many times factory installed cut off switch is after the power for the propane/CO alarm ( safety requirement). Should be easy to check by following +12V wire from Cutoff switch to battery. Also check to see if there is a small 3rd wire from cut off switch that remains powered.
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Old 12-30-2015, 04:56 PM   #4
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Battery Dead

The battery cut off switch was installed after market, so it totally interrupts all current drain from rv. As mentioned checked in RV after engaging cutoff switch and small op lites on alarms are off along with everything else.
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Old 12-31-2015, 11:07 AM   #5
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I know it's a new battery, but it's starting to sound like bad battery. Might pay to have the battery load tested ---- or, you can load test yourself if you have a load tester.

If the battery test OK, I'm out of ideas.
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Old 12-31-2015, 11:29 PM   #6
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Was it fully charged when installed?
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Old 12-31-2015, 11:39 PM   #7
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Quote:
Originally Posted by RedRollingRoadblock View Post
Was it fully charged when installed?
THIS^^^^

If you check the date code on the battery you may very well find that it's many months old. The factory charge is only good for 3 or 4 months. It may have been more than half-discharged when you installed it.
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Old 01-01-2016, 07:59 AM   #8
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THIS^^^^

If you check the date code on the battery you may very well find that it's many months old. The factory charge is only good for 3 or 4 months. It may have been more than half-discharged when you installed it.
X2.... you can only know if a battery is fully charged by having and knowing how to use a hydrometer. Also, have you checked voltage at the battery?
ww
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Old 01-01-2016, 08:39 AM   #9
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Might seem intuitive, but check breakaway switch.
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Old 01-01-2016, 09:21 AM   #10
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Might seem intuitive, but check breakaway switch.
X2 FB.... that would sure run down a battery in a NY minute. Plus, make sure the break-away is not wired through the battery cut off switch... it should be wired directly (to +)on the battery. Thanks for point that out, FB.
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