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Old 11-30-2015, 10:30 AM   #1
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Battery tender use full time during storage periods?

Do any of you use a battery tender on your trailer batt or boat batts full time when your rig/toys are in storage?

I am concerned to leave it plugged in for months at a time since my storage is an hour away and I can't check on it easily.

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Old 11-30-2015, 10:33 AM   #2
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I use a Battery Minder every winter. It uses less electricity and does a better job with the batteries than the built in charger. I do the same with my lawn tractor and any cars in the garage when we take an extended trip.

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Old 11-30-2015, 10:35 AM   #3
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Mine's only 15 minutes from here, but I remove the battery and bring it home with me. I do use a battery tender, but I also check the water monthly. If I couldn't check it at least that often, I wouldn't use a tender. I have maintained large batteries for many years as part of my profession. Boiling a battery down to the plates is not good... boiling it dry is asking for disaster.
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Old 11-30-2015, 03:42 PM   #4
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I've used battery tenders on my house (AGM) and chassis (wet cell) battery's for at least four years now. I have left them on for periods of at least 6 months or more and have never had any issue by doing so.
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Old 11-30-2015, 07:32 PM   #5
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I pull the battery and put it in the garage on a battery tender from November to April and never had an issue. My motorcycle is on a tender all year round and 5 years with original battery.
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Old 12-01-2015, 05:32 AM   #6
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They work just fine on a continuous basis as they are electronically built to only charge as needed. Here's some reading about how they work: Battery Tender - Float / Maintenance Charging. Unfortunately, the two Battery Tender Jr brand units I've had went to charger heaven after several years almost 100% use with them being replaced by a couple Schumacher's.
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Old 12-01-2015, 08:06 PM   #7
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My only objection to the "set it and forget it" answer is that they do sometimes fail and can cause the battery to overcharge and boil dry... and possibly explode...
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Old 12-01-2015, 08:25 PM   #8
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The best thing you can do for the battery is disconnect it, charge it, and then keep in inside until you need it again.

Do NOT leave it plugged in.
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Old 12-02-2015, 12:09 AM   #9
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Perhaps not relevant, since my experience is with motorcycle batteries. But, I've been using Deltran Battery Tenders for a couple of decades now on a variety of different bikes. As I've aged (lol) I've become more and more of a fair weather rider, so my bike is parked for 4 to 5 months over the winter. In my early days (riding since 1963) I got used to buying new batteries every 3 or 4 years, haven't had to buy a new battery in 25 years...

Current bike is 13 years old, and has a very difficult to access battery (30 minutes+ to get to it) and does quite well on the Tender.

As they say, YMMV.
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Old 12-02-2015, 02:30 AM   #10
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My MH is a coachmen and the factory peeps said to not use the on board converter for long term charging when in storage. They suggested to disconnect the neg terminal and put a maintainer on the batteries (after ensuring the batteries are fully charged).
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Old 12-02-2015, 07:52 AM   #11
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me too

i use a battery tender for my tractor and my TT

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Old 12-16-2015, 09:03 PM   #12
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I use them on my lawn tractor, side x side (UTV), motorcycles and snowmobiles.
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Old 12-16-2015, 10:20 PM   #13
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So they told you not to run you factory converter while storing the trailer.

Not sure which one you have in your trailer. But on mine I have the wifco I think that's how you spell it. And it's a 3 stage charger.

I leave ours plugged in year round and have two six volt battery's that I check once a month and add what is needed. And have yet to fill them in 3 years now. Which is telling me thins are working well.

Also if you are full timing in your trailer guess what your converter will be charging the whole time and you can damage the converter by leaving a terminal disconnect and the trailer plugged in.

So if I were you if you can't stay plugged in move the battery's inside and use a C tech charger if not plug in and check it once month.
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Old 12-17-2015, 09:17 PM   #14
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If you have a trailer with a multi-stage charger/converter, just leave it plugged in when not used, after checking the battery levels before storage.
I leave my fiver connected all-year when not being used, and the converter, a PDI 9280, keeps everything under control.

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battery, full time, storage

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