Schumacher 10/2 amp Dual Rate Battery Charger - Fiberglass RV


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Old 06-08-2013, 03:14 PM   #1
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Schumacher 10/2 amp Dual Rate Battery Charger

I got a good deal (I think) at Big Lots for a Schumacher 10/2 amp Dual Rate Battery Charger. According to the instructions, I'm to set the charger to 2amp for a trickle (maintenance) charge. Over the winter, I'll bring the battery (deep cycle) to the garage.

I'm wondering... the instructions say I need a 24" long (or longer) 6-guage (AWG) insulated battery cable that I'm to attach to the negative battery post.

I know a number of instructions are written because of liability problems for the manufacturer. But is THAT cable really necessary? Or can I just hook up positive to positive and negative to negative and put it on 2amp?

Don't worry. I won't say "so and so said" if I blow up the battery or burn my house down. I'm just wondering if spending the money on the supposed cable is really necessary (needed) or written for manufacturer liability.

Thoughts? AND TIA!!
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Old 06-08-2013, 04:08 PM   #2
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That trickle charge is still for a dead battery, I have that charger, and wouldn't use it for winter maintenance.

You want a float charger.

Oh, and I've always used the charger leads as is.
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Old 06-08-2013, 04:17 PM   #3
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Oh man, now I'm really confused. I thought a trickle charger was to maintain a battery. Now, you're telling me it's to charge a dead battery? Crap, now I'll have something else for Craigslist. D'OH!
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Old 06-08-2013, 04:26 PM   #4
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Donna, I'm not familiar with your particular charger, but if it is like mine, the extra wire is for the charger to sense the temp. of the battery as it charges, and will switch over to the maintaince/float mode automatically. Did you get an instruction manual with it or does it have info. you could use to do a search for the manual? I have to say I'm feeling a little weird trying to give any advice to our Yota.
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Old 06-08-2013, 04:33 PM   #5
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You might find the manual here: Schumacher:


Sounds like a trickle charger, not an automatic float charger.
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Old 06-08-2013, 04:50 PM   #6
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I'm sitting here reading the five pages of instructions that came with the charger. It definitely says "2 amp Trickle/Maintenace Charger."

So, that's NOT what I need to maintain a battery off the trailer for wintering over?

Group... it's okay. I've purchased or acquired three different batteries for the Scamp in the last ten years. Not a lot of $$. I just keep reading about members that keep batteries for years and when I saw this thing at Big Lots, I thought COOL! I can maintain the trailer deep cycle battery for a bit longer.

If I bought the wrong thing because I ASSUMED the wrong thing.... that happens. It was cheap enough, I may leave it as a "give away" at a gathering!
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Old 06-08-2013, 05:06 PM   #7
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I would think, this IS what you would need, but you would have to place that extra wire as instructed, for it to work as designed.
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Old 06-08-2013, 05:15 PM   #8
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I'm cheap and readily recognize it . Okay, so tomorrow I'll go buy the "24" long (or longer) 6-guage (AWG) insulated battery cable" that the instruction say I should have.

If I don't really need it, it will look wonderful as a neckless sans emeralds and diamonds.

Thanks group, much appreciated! Truly.
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Old 06-08-2013, 06:30 PM   #9
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Okay, this solves the problem!
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Old 06-08-2013, 07:43 PM   #10
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A 2 amp trickle charger will give you 2 amps non-stop. Your battery doesn't need anywhere near that much. A float charger regulates it, and usually puts out well under an amp.
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Old 06-08-2013, 09:09 PM   #11
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I don't believe in using a battery tender type charger/ maintainer. I'll take batteries out of campers or vehicles, put them in the basement, and every couple months test them with a load type tester and then hook up a charger that tapers off the charge as the battery comes up to full charge. Just my opinion, works for me.
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Old 06-08-2013, 09:45 PM   #12
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A two amp charger will boil a battery. If this charger tapours off the amps until it reaches near zero, it will do what you want it to do.
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Old 06-08-2013, 11:59 PM   #13
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Donna, Schumacher makes a wide range of chargers. If you want useful interpretation of the instructions, I suggest posting the specific model number.
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Old 06-09-2013, 06:38 AM   #14
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Quote:
Originally Posted by Donna D. View Post

I'm wondering... the instructions say I need a 24" long (or longer) 6-guage (AWG) insulated battery cable that I'm to attach to the negative battery post.

I know a number of instructions are written because of liability problems for the manufacturer. But is THAT cable really necessary? Or can I just hook up positive to positive and negative to negative and put it on 2amp?


Thoughts? AND TIA!!
Hi Donna. Connecting a charger that is plugged in or was recently plugged in could result in a spark that could ignite any hydrogen gas near the battery. Reading the instructions (I picked one from Tom's list) I think the intent of the 2 ft wire is to put any spark 2 ft. away from the battery. The only reason I can think of for using such a large wire is to provide something large to connect those less than stellar clamps that come with battery chargers.

I have your chargers grandfather, a '80's vintage Napa 10 - 2 charger. The 10 amp setting is for larger auto batteries and the 2 amp for smaller motorcycle batteries. Mine shuts down to trickle or float ( these terms seem to be used interchangeably) when the battery reaches a certain voltage level. When I use mine I touch the battery clamps of the unplugged charger together to eliminate any stored energy. I set the switches, connect to the battery terminals and only then plug it in. I never leave a charger plugged in all the time and when I charge I always check it periodically with a volt meter. I'm with Bob. I charge when needed. Be safe, Raz
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