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Old 02-12-2014, 07:47 AM   #21
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I have Battery Tender Juniors on my 3 sump pump backup deep cycle batteries. They are on 24/7/365 with no problems.

http://www.walmart.com/ip/15779492?w...264470&veh=sem

They are 4 stage chargers (including a desulphate stage).
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Old 02-12-2014, 08:24 AM   #22
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My battery, water level and charger - it's surprising what I don't know

Great thread. Lots of good info. I have the battery tender Jr like Herk has. I followed hid advice from a previous thread.
My battery has been on it since Nov except for a couple times when I took the battery to go check trailer. It's been working fine.
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Old 02-12-2014, 08:49 AM   #23
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Those Battery Tender Jrs are a great bang for the buck. I have used one for my motorcycle battery since I bought the bike. The first battery lasted 10 or 12 years as I recall. I credit that charger.
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Old 02-16-2014, 01:14 PM   #24
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Let me see if I am correct, since I can not plug the battery in at storage, I bring it home & charge it once a month, checking the water level, it is in the house from November until April. You are saying, check the water monthly & plug it into a Battery Tender Juniors, for the whole time. At the camp ground it is plugged into the 120 volts from May until October, I also check the water once a month. Is this correct?
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Old 02-16-2014, 01:18 PM   #25
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I was put in the garage yesterday to get my heat gun for the limoncello shrinkwrap tops and saw that my battery was wet on top and on the workbench:
Click image for larger version

Name:	ImageUploadedByForest River Forums1392574662.160861.jpg
Views:	144
Size:	45.9 KB
ID:	46336

The water level didn't appear to change much when I popped the caps and looked.

Any idea why this may have happened? Crappy charger, perhaps?
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Old 02-16-2014, 04:41 PM   #26
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Usually this happens when to much water is added and then a normal charge is done, otherwise I think it would be an overcharged by the charger which would be causing heating/boiling of the electrolyte or you have a bad cell causing excess heat in that cell......
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Old 02-17-2014, 07:47 PM   #27
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Quote:
Originally Posted by ependydad View Post
I was put in the garage yesterday to get my heat gun for the limoncello shrinkwrap tops and saw that my battery was wet on top and on the workbench:
Attachment 46336

The water level didn't appear to change much when I popped the caps and looked.

Any idea why this may have happened? Crappy charger, perhaps?
Looks like over charging to me.

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Old 02-17-2014, 10:22 PM   #28
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Have you had a chance to test this battery yourself or at the local battery store? Just curious what the results of a load test would be.

As for the water on top, I think I'd agree about the overcharging, but you could have also added too much water.

There could be one other thing when you added water. Do you recall if you add the distilled water before or after you began the charge cycle? I have seen wet tops like this when the water was added before charging, which is the incorrect way. Always charge first and then add water (caveat - it's ok to add just enough to cover the plates before charging but that is the exception).

Lastly, Doug, did you check for any cracks in the casing?
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Old 02-17-2014, 10:55 PM   #29
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That battery is fine for your use, and may last for awhile yet. I personally do not favor keeping a battery plugged into a charger if it can be disconnected for storage. But I am in the minority, it seems.

Group 24 battery's are typically in the 75-80 amphour range but if your use is plugged in then it don't matter much.

I did spend a bit of $$$ on a 7 amp CTEK charger that has 8 stages and am checking that out, but the more basic charger probably do 95% of what's needed, especially if they are not left hooked up.
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Old 02-17-2014, 11:22 PM   #30
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I've never added water to this battery nor have I had it tested. I think we have a BatteryPlus in town- I'll try taking it to them one day this week and see what they say about it. I should also order a hydromagic tester so that I can verify it myself (I'm not the trusting sort).

I haven't removed the battery from the camper before nor had I ever checked the water levels. I installed a battery disconnect and simply disconnected the battery when not in use. I left my stock converter handle the charging. This all was something new for me- solely because the battery was so dead when the driver went to pickup the camper this past time.
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