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Post by Deleted on May 10, 2020 16:40:03 GMT
It's going to be for over gassing? My bet is on it recovering. I suppose the term valve does basically mean one way and that way is out not in. Still on 14.65v and charger says not quite charged so it does look good. The charger is 15a although on the "Recond" cycle it could be lower I don't have an ammeter on the charger lead. I think I might have to get my anorak on and stick the data logger on this battery and do a controlled discharge with a known load like a tunnel light or something. It's possible that being submerged for 10 days has had no effect other than to partly discharge it.
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Post by Deleted on May 10, 2020 17:48:47 GMT
Charger stopped and battery rested at 12.9 so I did a little wire melt test. Connect a reasonable short wire about 15 amp across the terminals and let it burn. After that the voltage was 12.8 so it can supply current. So maybe it's perfectly ok then. Need to take out any potential surface charge before testing with the conductance meter. Seems ok on the dial with the thing pointing at 44 amp hour capacity. Slightly less convincing on the CCA rating which says 380 on the battery. 44ah setting well into the green 380CCA (en) which translates to about 400 (SAE) is not quite so impressive but overall the battery does not seem to have suffered any negative effects from its swimming exercise. The meter reads 4kW on the kW scale. Not seen many meters which read battery capacity like that but ability to deliver a certain wattage is relevant for IC engine starting batteries. 4kW, using the W=VA rule, would be 4000/12.7=315amps deliverable current but no mention as to how long for.
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Post by Isambard Kingdom Brunel on Jun 12, 2020 11:52:47 GMT
What was the outcome of the battery? Is water cooling an option then?
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Post by Deleted on Jun 12, 2020 11:53:55 GMT
It seems to be working fine as I used it for a little bit of electric outboard running a couple of days ago after charging and leaving it for a few weeks and it behaved normally.
Actually that was a month. I charged if then forgot about it.
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Post by JohnV on Jun 12, 2020 11:55:23 GMT
I think the term should be "Jammy git"
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Post by Deleted on Jun 12, 2020 12:01:40 GMT
I think the term should be "Jammy git" Well a bird did shit on my shoulder the other day. Not the first time it has happened.
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Post by Isambard Kingdom Brunel on Jun 12, 2020 17:22:12 GMT
It seems to be working fine as I used it for a little bit of electric outboard running a couple of days ago after charging and leaving it for a few weeks and it behaved normally. Actually that was a month. I charged if then forgot about it. This echoes my experience with "sealed" batteries that have been fully immersed, we are both lucky then.
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Post by JohnV on Jun 12, 2020 17:28:17 GMT
ok .... a pair of jammy gits
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Post by Deleted on Jan 7, 2021 8:29:06 GMT
As a responsible boater, shouldn't you retrieve it anyway? I have had a sealed lead acid battery underwater for 4 months when a battery box filled up over winter. It had not taken in any water that I could see looking at the silly magic eye and it is still working fine. The brass terminals and their steel bolts were corroded away on the positive post, electrolysis I assume. It was not flat, it was in a battery bank on a solar panel. I am really surprised but its perfectly OK. That's interesting. I did have a look at getting it back and I know about the whole saving the planet issue but it wasn't me who dropped it in. The battery is still your property, and it is your responsibility. Would you believe, I sometimes pick up litter that some one else has dropped? Not so easy now some Worksop Wanker has stolen everything off my roof, including the litter picker, truly thought it was well enough hidden under the solar panels, at least they were screwed down, unlike the whirlie-gig and the garden fork, which were jammed underneath. The scrotes by the way walk up and down the towpath during tbe day pretending to fish and visit at night, when they finish working at the sandwich factory, which is 04.00.
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Post by Deleted on Jan 7, 2021 9:34:39 GMT
If you continued reading the thread you will discover that I did succeed in recovering the battery.
So are you saying if someone stole my battery then threw it off a motorway bridge killing a car driver it would be my responsibility because it was my battery ?
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Post by peterboat on Jan 7, 2021 10:24:21 GMT
If you continued reading the thread you will discover that I did succeed in recovering the battery. So are you saying if someone stole my battery then threw it off a motorway bridge killing a car driver it would be my responsibility because it was my battery ? She probably is, but once its stolen it isnt, unless you put a sign on it saying please steal me! Like she has with storing possessions on the roof that she want to keep!!
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