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Old 05-14-2013, 11:25 PM   #11
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I believe, based on experience and some research that keeping a battery at the float voltage without being used or disconnected to "rest" may lose the ability to handle deep discharges when needed.

I always leave my batteries disconnected when not in use. Use them when I need to. Keep it charged, let it rest.

There is even some research that it is good to draw a deep cycle all the way down to 11.8 volts and then gently back up at the 20 hour rate (10 amps for a 200 AH Bat), but I don't know about that, seem kind of extreme.
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Old 05-15-2013, 08:04 AM   #12
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Quote:
Originally Posted by BarryD0706 View Post
Not true.
I agree
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Old 05-15-2013, 08:32 AM   #13
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Quote:
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The rep at lazydays told me to leave it disconnected while plugged in too. He said it will charge while I tow it.
You won't get a definitive answer here but I can tell you my opinion is
that a modern 3 stage charger like you most likely have in your new trailer
won't over charge a battery in good condition.
In other words you can leave it connected.

That part about it will charge while you tow is VERY misleading.
This is discussed here all the time! Several times a year.
Some think it will charge on the road. MY experience is that it won't
charge enough to make much difference.
See this thread about battery charging while on the road--Does the truck charge the trailer battery?
Especially note my post 6 in that thread.

Finally, I've had great luck for well over 5 years using a little Battery Tender Jr.
I disconnect my trailer batteries while in storage. I do this with a battery disconnect switch. I guess that "red key" you talk about does the same thing.
I plug in a little Battery tender Jr and leave it. My batteries are kept charged and we were able to dry camp in Pisgah National Forest last season for 5 nites.
I did run the genny on the 4th day because we'd been watching a RedBox movie on the TV each night using battery power.
I'm trying to say my 4 year old batteries are still working pretty good.
I give the battery tender credit for that.
You can buy a battery tender Jr for about $25. For any battery that's in storage
more than it's used-- my motorcycle, my truck, my trailer, my lawn tractor
in winter, I use BT jrs. I have several!! I got 4 seasons out of my last motorcycle battery this way. Most guys will tell you they have to replace their motorcycle batteries every couple years.
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Old 05-15-2013, 08:54 AM   #14
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and not to thread-jack my own thread, but while plugged in during warm months, do you all leave the AC run on say 80-85f to keep moisture down ?

i like the idea of the battery tenders, not just on trailers, but on bikes, mowers or anything that isn't getting started and charged once a week.
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Old 05-15-2013, 11:40 AM   #15
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The cool thing about some of the battery tenders is that they do "shut off" most of the time and only charge when needed, so that the battery is not floating at 13.2volts all the time which is what the WFCO converters do.

At least the current generation chargers don't fry the batteries like the older ones have a tendency to do.
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Old 05-15-2013, 12:54 PM   #16
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Originally Posted by melk-man View Post
and not to thread-jack my own thread, but while plugged in during warm months, do you all leave the AC run on say 80-85f to keep moisture down ?

i like the idea of the battery tenders, not just on trailers, but on bikes, mowers or anything that isn't getting started and charged once a week.
I leave the a/c set at 85 in the hot months.
I have battery tenders on both of my harleys, they work great!
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