D.C. battery help?

Submitted: Sunday, Jun 26, 2016 at 18:52
ThreadID: 132865 Views:2718 Replies:5 FollowUps:0
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Hi folks.
Seems I went and left my vans fridge on battery power for a few days and now
its dead flat. Problem is, the Projecta 4300 doesn't seem to be charging - left the house 240v plugged in for 2 days but nothing.
The red "power" light is on the charger, but no amber "charging" light.
What gives?
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Reply By: Notso - Sunday, Jun 26, 2016 at 19:20

Sunday, Jun 26, 2016 at 19:20
When a battery is dead flat most smart chargers will not commence charging. A solution is to hook up two batteries in parallel and then put your charger on. make sure you use jumper leads or other heavy duty cabling to hook the batteries together. Make sure they are in Parallel not series. Positive to positive negative to negative.
AnswerID: 601847

Reply By: swampy - Sunday, Jun 26, 2016 at 19:29

Sunday, Jun 26, 2016 at 19:29
Sounds like the battery is so flat that its below the chargers threshold to charge .
Parallel charge 2 batteries 1 partially flat unit and the flat unit . [ The good unit should lift the voltage of the flat battery and enable the charger to work. ]

Highly recommend that u install a low voltage disconnect . This will save u from this situation occurring again .
An additional install is a main battery isolater . This shuts down the whole system preventing parasitic drain as well .
Both of the above are inexpensive upgrades

AnswerID: 601848

Reply By: Paul E6 - Sunday, Jun 26, 2016 at 22:38

Sunday, Jun 26, 2016 at 22:38
Thanks for the good answers.
AnswerID: 601855

Reply By: TomH - Monday, Jun 27, 2016 at 07:36

Monday, Jun 27, 2016 at 07:36
If you havnt got an extra battery take it to Battery World who will be able to charge it for you. I had one that read 1.6Va after a switch in a car jammed. Took 3 days to recharge but its still going 18 months later.

They did it for free as well but we had bought it there.
AnswerID: 601858

Reply By: mynance - Monday, Jun 27, 2016 at 18:37

Monday, Jun 27, 2016 at 18:37
Did similar thing a couple of weeks ago thought I had the Engle on 240 but did not have it plugged in properly was showing 10 volts.
Decided to leave it hooked up to the DC-DC charger till we smelt horrible smell 120 amp hour battery was swollen up like a football.
Took about 5 hours to cool down.

AnswerID: 601889

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