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Phantom Battery Drains


GlennWest
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Well, went ot crank my truck yesterday. Hurricane threatening. Don't think we going to get much now though. Batteries dead. Replaced them a few months ago. I have to park truck away from camper here. So can't use my trickle charger. I was surprised it went down that fast. Do believe they are damaged also. Charged them for 24 hours nat 10 amps and it cranked up. Drove kup town and filled up. Came back to park and shut down. Waited a minute or so and dragged turning over and then got a little faster and fired up. Will try again after it cools down and see. But anway, is it normal to go down that bad in a few months? or do i have a problem

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Maybe, just barely quick. A glove box light will kill a bank over that length of time. What's your history with leaving it parked look like? 24 hours @ 10 amps is only 240 Ahr. A 3 battery bank is 2/3 full, a 4 battery bank is just over 1/2 full. Let the charger sit longer, or get some highway miles under you. The cranking speed increasing is interesting, sounds like a loose connection somewhere. As the heat builds, the connection tightens up, better current flow = starter speeding up.

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24 hours no problem. I have went a week with no charging. But I have never been this long before without a way to charge. I may have destroyed a good set of batteries when i replaced them a few months ago. I will hook charger back up and let it set for a few days and see.

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4 hours ago, GlennWest said:

I just had not charged it long enough. On 75 per cent now. Was only 50 per cent yesterday.

Go to a battery place have them do a draw test.  They'll charge them and test them.  The test will tell you the condition of each battery.

Also like others have said put in a battery switch.  Solar charger is a good idea.

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It's spinning good now. Fixing to drive 300 miles tonight. That should top them off. Going to Fredericksburg RV. I will put a panel on it. I never had a problem until I got in this rv park. Had to park in overflow area. Also I realize now I never got a full charge on those new batteries. 

Edited by GlennWest
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While a battery disconnect switch obviously solves the problem, many of the phantom loads are useful.  Keeping the stations & adjustments on the radio, time on clocks, etc and other settings that are a PIA to reset makes a disconnect switch a better idea for long term storage, but for a week or two, a  small solar panel is a good solution.  Under 15 - 20 watts won't even need a controller...

Edited by vermilye
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  • Phil D changed the title to Phantom Battery Drains
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6 hours ago, lockmup68 said:

I used the same one before I got storage with electric.  

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On 8/26/2020 at 8:23 AM, vermilye said:

While a battery disconnect switch obviously solves the problem, many of the phantom loads are useful.  Keeping the stations & adjustments on the radio, time on clocks, etc and other settings that are a PIA to reset makes a disconnect switch a better idea for long term storage, but for a week or two, a  small solar panel is a good solution.  Under 15 - 20 watts won't even need a controller...

I don't know much about electronics but when I hit the switch my radio didn't lose its presets. Setting the factory clock is turning a dial.

But yes I agree for a few weeks a solar panel is probably a good idea.

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