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Old 04-03-2010, 07:49 AM   #11
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Depending on your trailer there could be several things inside
draining your batteries.
If you have LP gas detector, it's always on.
Your onboard power center itself will drain your batteries
when you aren't plugged in.
A battery that is completely drained might be ruined.
You can pull a bunch of fuses each time you store your trailer
but I get tired of being down on my hands and knees doing
this pretty fast.
I've installed a battery disconnect switch in every one of my
trailers for these reasons.
They should be standard equipment in all new trailers but very
few builders install them.

You can get a decent little digital volt meter at Harbor Freight
for less than $5 on sale. Or go visit Radio Shack. Everyone with
an RV needs a multi meter!!
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2004 5.3L Silverado 1500 ext. cab 2WD
1999 Suzuki Intruder Motorcycle
Blue Ox WD hitch, AirLift load levelers

Camping days 2010-53, 2011-47, 2012-41,
2013-41, 2014-31, 2015-40, 2016-44, 2017-63
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Old 04-03-2010, 09:48 AM   #12
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Can you leave on a trickle charger for say 5 months while unit is in storage ?
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Old 04-03-2010, 10:46 AM   #13
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It absolutely depends on what kind!
There are dozens of different kinds on the market.

Many folks here use the battery tender brand.
The battery tender Jr. costs about $25 and it will keep your
battery fully charged and not boil off the electrolyte.
Harbor Freight has a knock off version that's in the $10 range.
I have a couple of each and am happy with both kinds.
I use them on my motorcycle in the winter, my riding lawn mower,
my truck which is not used much in the winter and my trailer.
I have found that they all stay charged and do not use water any
more than normal.

If you use one of these you can top up your battery with distilled
water and it will be OK for 5 months.
You also want to be sure nothing is on in your trailer!
LP detector and even the onboard power center will suck your
battery dead unless you pull fuses or have a battery disconnect
switch.

Other chargers and YMMV!
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2004 5.3L Silverado 1500 ext. cab 2WD
1999 Suzuki Intruder Motorcycle
Blue Ox WD hitch, AirLift load levelers

Camping days 2010-53, 2011-47, 2012-41,
2013-41, 2014-31, 2015-40, 2016-44, 2017-63
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Old 04-05-2010, 07:24 PM   #14
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Big thanks KY.
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Old 06-13-2010, 11:55 AM   #15
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Does anyone have a picture of the Harbor Freight knockoff? I have a Harbor Freight across town from me, and would just like to make sure I'm getting the correct item. Thanks.
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