More deep cycle

Submitted: Wednesday, Jan 06, 2010 at 07:25

ThreadID: 74927 Views:2580 Replies:2 FollowUps:2

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Battery Power

In this article we explain why you might need an additional power source independent of the starting battery installed into your vehicle and we look in detail at types of batteries,

waeco shopper

I bought a 12v 100ah D C battery to power a waeco fridge and a 6 or 7 phase (can't remember which) mains charger. This circuit is not connected to the vehicle electrics. The battery has had one charge on the 30amp mains charger. The charge time was 12 hours. I used the battery for around 12.2v
I put the battery on the mains charger, it started running it's cycle then started beeping with warning light 'Faulty Battery'

I connected the battery via jump leads to the car for 30 mins.
I checked the battery voltage and it was 12.37v
I put the battery on the mains charger, it started it's cycle then ran for a much longer time then started beeping with warning light 'Faulty Battery'

Anybody care to share any magic tips on recovering the battery (beyond replacing the battery, this one was only 3 days old!)?

Could the faulty fuse/connection have caused this?

Thanks

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Reply By: waeco shopper - Wednesday, Jan 06, 2010 at 07:31

Wednesday, Jan 06, 2010 at 07:31

Reposting this message as first time it lost words suspect because it used the 'less than' and 'greater than' symbols

More deep cycle

I bought a 12v 100ah D C battery to power a waeco fridge and a 6 or 7 phase (can't remember which) mains charger. This circuit is not connected to the vehicle electrics. The battery has had one charge on the 30amp mains charger. The charge time was 12 hours. I used the battery for around less than 6 hours and then noticed the fridge had gone off. On reconnecting the fridge through to a second auxillary D C battery, I realised that the fuse holder was giving a bad connection (going on/off when moved, suspect the fuse holder wasn't optimum fit for fuse but all new correct parts, grrrr!! the fuse was fine/hadn't blown).

I put the first D C battery on the mains charger. Almost immediately it started beeping with warning light 'Faulty Battery'
I checked the battery voltage = 12.19v

I connected the battery via jump leads to the car for a few mins.
I checked the battery voltage and it was greater than 12.2v
I put the battery on the mains charger, it started running it's cycle then started beeping with warning light 'Faulty Battery'

I connected the battery via jump leads to the car for 30 mins.
I checked the battery voltage and it was 12.37v
I put the battery on the mains charger, it started it's cycle then ran for a longer time then started beeping with warning light 'Faulty Battery'

Anybody care to share any magic tips on recovering the battery (beyond replacing the battery, this one was only 3 days old!)?

Could the faulty fuse/connection have caused this?

Thanks

AnswerID: 397855

Follow Up By:- Wednesday, Jan 06, 2010 at 09:11

Wednesday, Jan 06, 2010 at 09:11

Hello waeco shopper,

it looks like the faulty fuse holder (on your fridge?) was the reason the fridge disconnected itself after 6 hours run time on the first battery (or a faulty battery...).

I highly doubt that this bad connection could have damaged your 100Ah deep cycle battery though.

I presume the alternator was spinning when you connected this battery to the car?

What was the battery voltage after it came off the charger?
A good charger/battery would bring the open circuit voltage to around 13.0V on an VRLA AGM (12.8V for flooded cell).

All voltages you gave, are rather low - I expected them to be at least 0.5V higher.

To work out if it's the battery or the charger, discharge your second battery first, and then use your charger to bring it back. It should show at least 12.8V open circuit.

If this works, then your first battery is probably shot.
As it seems to be almost new, just ask the seller what he recommends.

Best regards, batterymeister

FollowupID: 666706

Follow Up By: waeco shopper - Wednesday, Jan 06, 2010 at 09:37

Wednesday, Jan 06, 2010 at 09:37

Hi batterymeister

Yes the alternator was spinning when the D C B was connected to the car.

When it came off the charger... can't remember exactly, I think 12.3x but not sure, it didn't do much charging and would've also had a recent boost from the car a short while earlier.

I will try charging the second D C B.

Thanks

FollowupID: 666711

Reply By: poppywhite - Wednesday, Jan 06, 2010 at 10:20

Wednesday, Jan 06, 2010 at 10:20

If you realy suspect battery just return it. Most deep cycle have 12month warenty and dealer should give it a thourough test in front of you. A reputable outlet will have no problems with this and if tests ok would most likely top up the charge for you as well.

AnswerID: 397877