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Old 11-14-2014, 02:02 PM   #31
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So, this thread and my battery. My battery sucks- it doesn't seem to hold much of a charge and parasitic draws kill it within a couple of days.

I'd like to try and do a Walmart night or two this winter as we get further south and it's bearable. Here's my plan:

1) Buy a battery hydrometer & test the battery myself (this one?)
2) Take the battery somewhere to get it tested (Battery Plus?)
3) Connect it to the cheapo charger that I own

Other thoughts?
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Old 11-14-2014, 02:19 PM   #32
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Originally Posted by ependydad View Post
So, this thread and my battery. My battery sucks- it doesn't seem to hold much of a charge and parasitic draws kill it within a couple of days.

I'd like to try and do a Walmart night or two this winter as we get further south and it's bearable. Here's my plan:

1) Buy a battery hydrometer & test the battery myself (this one?)
2) Take the battery somewhere to get it tested (Battery Plus?)
3) Connect it to the cheapo charger that I own

Other thoughts?
Make sure your freezer defroster is off when boondocking.
It will kill your battery in short order.

Ditto for your tank heaters.
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Old 11-14-2014, 02:31 PM   #33
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Make sure your freezer defroster is off when boondocking.
It will kill your battery in short order.

Ditto for your tank heaters.
No tank heaters for us. I don't think I've ever taken notice to this switch being on my fridge, but I'll take a look at it.

I do know that I accidentally left my fridge on and the doors propped open for a couple of days in front of my house. That did a number on the battery.
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Old 11-23-2014, 03:15 PM   #34
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Resurrecting this old thread again- I took the battery to BatteryPlus and after charging it, they said the battery was fine. It shows 510 CCA (instead of it's marked 550), but it should be fine. The kid yesterday when I dropped it off said it was reading 12.0volts when he put a voltmeter on it and told me to not have high hopes. Unfortunately today, he was with a different customer as the kid I got today wasn't extremely helpful- he plugged in a portable machine, it did it's thing and he said it was showing good.

So that's where I'm at.

I did measure the compartment/battery box. Strangely, there's a huge amount of storage space down there, but only a small inset for a battery (12"x7" and maybe 10" tall).

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Old 11-23-2014, 03:26 PM   #35
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What is the model number of the battery?

CCA usually means it is a starting battery. They are poor choices for a house battery as they have very little capacity. They are designed to give up their charge quickly and then be dead.
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Old 11-23-2014, 03:32 PM   #36
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Quote:
Originally Posted by ependydad View Post
Resurrecting this old thread again- I took the battery to BatteryPlus and after charging it, they said the battery was fine. It shows 510 CCA (instead of it's marked 550), but it should be fine. The kid yesterday when I dropped it off said it was reading 12.0volts when he put a voltmeter on it and told me to not have high hopes. Unfortunately today, he was with a different customer as the kid I got today wasn't extremely helpful- he plugged in a portable machine, it did it's thing and he said it was showing good.

So that's where I'm at.

I did measure the compartment/battery box. Strangely, there's a huge amount of storage space down there, but only a small inset for a battery (12"x7" and maybe 10" tall).

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The battery leads in your picture seem a bit undersized for a standard deep cycle battery. Maybe thats why its so small, not designed for a deep cycle bat.
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Old 11-23-2014, 03:40 PM   #37
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What is the model number of the battery?

CCA usually means it is a starting battery. They are poor choices for a house battery as they have very little capacity. They are designed to give up their charge quickly and then be dead.

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Originally Posted by Still Kickin View Post
The battery leads in your picture seem a bit undersized for a standard deep cycle battery. Maybe thats why its so small, not designed for a deep cycle bat.

It seems to be a hybrid starting/deep cycle battery. From the pics in the first post (the battery doesn't show anything else), it seems to be a Deka DP24 if I have that right.

It's definitely not a true deep cycle.

Now I'm mostly wondering if I'll get an overnight of low furnace and fridge use out of it (thermostat set to 60-65). I'm just not sure what overnight temps will be. It's just a backup plan as I'm hoping to make it to a Camping World and use one of their service spots with electric for the night. I do plan on running an extension cord from the truck for my CPAP machine (I've done this tent camping before).
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Old 11-23-2014, 03:46 PM   #38
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The Deka DP24 is the same battery I have (except I have a matched pair).

It is a 75AH dual purpose battery.

The wires are perfectly sized as the camper is fused at 40 amps maximum draw.

If you intended to draw or charge higher than that (like with an inverter) wire size and fuse size would need to be increased.
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Old 11-23-2014, 03:50 PM   #39
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Quote:
Originally Posted by Herk7769 View Post
The Deka DP24 is the same battery I have (except I have a matched pair).

It is a 75AH dual purpose battery.

The wires are perfectly sized as the camper is fused at 40 amps maximum draw.

If you intended to draw or charge higher than that (like with an inverter) wire size and fuse size would need to be increased.

I understood the first two paragraphs. You lost me on the next two. How does the 3rd and 4th affect me?
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Old 11-23-2014, 03:53 PM   #40
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I understood the first two paragraphs. You lost me on the next two. How does the 3rd and 4th affect me?
Sorry, it was a response to Still Kickin's post.
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