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Author Topic: Ring battery charger  (Read 2140 times)

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pauls

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Ring battery charger
« on: 31 December 2014, 16:41:43 »
I have a Ring battery charger +8. I was charging up the fathers inlaws battery(still on the car) charging the battery at 4amps and after several hours the charger read the following information. Amps 0.4, volts 14.4,100% full.  But when I disconected the charger and tried to start the car it was dead as dodo. It was just clicking.
 I brought the charger home and put it on a battery I have in my shed and after 2 hours at a charge rate of 4amps.. it said that battery was also full. Now I find it hard to beleive that the battery that has been sitting in my shed for months could me fully charged in a couple of hours. Sorry fot the long story but I dont under it and was just wondering if the charger is at fault or weather I need to put a new battery on the car.
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flyer 0712

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Re: Ring battery charger
« Reply #1 on: 31 December 2014, 17:07:28 »
I think maybe it does depend on the age of the battery and how much it is discharged...if it is old and completely flat then may not respond to an ordinary charger......Example,my neighbors car dead flat battery on charge for 6 hours and would not even turn engine over,thus i thought charger was caput,,,,my battery  one year old,,,left lights on and went  flat same charger put enough in it after 1 hour to start car no problem....my neighbor had his tested by discharge tester and it was knackered...new battery fitted and was ok.. :y :y
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TheBoy

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Re: Ring battery charger
« Reply #2 on: 31 December 2014, 17:19:50 »
The first battery is probably shagged.  The 2nd, if it was charged before storage, shouldn't need much charge.
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Kevin Wood

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Re: Ring battery charger
« Reply #3 on: 31 December 2014, 19:31:46 »
Quote from: TheBoy on 31 December 2014, 17:19:50
The first battery is probably shagged.  The 2nd, if it was charged before storage, shouldn't need much charge.

.. and if it's been in the shed for too long, it'll also be shagged.
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pauls

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Re: Ring battery charger
« Reply #4 on: 31 December 2014, 19:58:58 »
Thats what i thought but why did it show a 100% fully charged on the charger.
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The Sheriff

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Re: Ring battery charger
« Reply #5 on: 31 December 2014, 20:01:18 »
Quote from: pauls on 31 December 2014, 19:58:58
Thats what i thought but why did it show a 100% fully charged on the charger.
Because it wasn't taking any charge so charger thought it was fully charged.
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Kevin Wood

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Re: Ring battery charger
« Reply #6 on: 01 January 2015, 13:07:15 »
Quote from: STMO on 31 December 2014, 20:01:18
Quote from: pauls on 31 December 2014, 19:58:58
Thats what i thought but why did it show a 100% fully charged on the charger.
Because it wasn't taking any charge so charger thought it was fully charged.

Yep, the charger isn't that intelligent, so it's designed on the assumption that it's connected to a battery in good condition.
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Marks DTM Calib

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Re: Ring battery charger
« Reply #7 on: 02 January 2015, 16:32:34 »
Quote from: pauls on 31 December 2014, 19:58:58
Thats what i thought but why did it show a 100% fully charged on the charger.

Because the charger only checks terminal voltage and not source resistance hence the voltage could well be fine but the battery is not able to deliver any significant current to support starting (you test this with a drop tester)
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hotel21

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Re: Ring battery charger
« Reply #8 on: 02 January 2015, 16:48:53 »
 ;D ;D ;D ;D

seems to be that time of year...

snap!   :y
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Nick W

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Re: Ring battery charger
« Reply #9 on: 02 January 2015, 17:35:56 »
About a third of the jobs I went to last month were knackered batteries.
It seems to be weather changes that finish them off.

But don't guess, use a battery tester to be sure.
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Andy B

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Re: Ring battery charger
« Reply #10 on: 02 January 2015, 17:44:42 »
Quote from: Nick W on 02 January 2015, 17:35:56
....

But don't guess, use a battery tester to be sure.

Last years, my daughter's car showed all the symptoms of a duff battery, so I took the car to my mate's motorfactors where he put his tester across ..... not the old style thing, but a box of electrickery that looked like a battery charger .... nowt wrong with the battery he said, something must be draining it. so we cheched this that and the other, nothing found. Several jump starts later we bought a new battery anyway ...... Sorted.

Moral being .... the test is only as good as the bloke with the tester!   ;) ;)
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aaronjb

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Re: Ring battery charger
« Reply #11 on: 02 January 2015, 20:00:23 »
Quote from: Andy B on 02 January 2015, 17:44:42
Moral being .... the test is only as good as the bloke with the tester!   ;) ;)

As demonstrated by the "Computer says X, replace Y" troubleshooting shown by most main dealers!

[edit] I went looking for a drop tester to buy and stumbled upon this listing on Amazon.. have a read of the description, it's Chinglish of the highest degree! http://www.amazon.co.uk/Cigarette-Lighter-Voltage-Voltmeter-BuyinCoins/dp/B0092KVYGI
« Last Edit: 02 January 2015, 20:02:30 by aaronjb »
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05omegav6

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Re: Ring battery charger
« Reply #12 on: 03 January 2015, 17:53:01 »
One of theses should do the trick...

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Vamps

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Re: Ring battery charger
« Reply #13 on: 03 January 2015, 22:22:00 »
Quote from: Taxi Al on 03 January 2015, 17:53:01
One of theses should do the trick...



Yep, that would do it............ :y :y
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