Leisure battery

[merl]

it is not one I would choose to actually rely on,

I Agree David, there is something in it but not a lot in my experience. May render a battery suitable for pond lights or a bench PS as in your case or knock off enough sulphate to reduce the self discharge to a decent level but never good enough to make a knackered leisure battery into a seriously useable one again.

 

[AlyJay]

When I bought my motorhome it came with a pair of 120Ah AGM Batteries which turned out to be knackered and lost power to hab electrics the first night I went away in it. I was planning on updating them but not quite so immediately.
But anyway ... had nothing to lose so on one of the batteries (now out the van), I set my Victron IP22 charger to around 15V and left it connected to the battery for around a week and in terms of amphours, it put in a couple of hundred Ah into this 120AH battery at 15V and the battery got nice and warm.
Idea was to recondition it and just see if it had any effect? Well, that battery became pretty usable after this process. It would hold its charge and provide much more power than it did when I first got it, so there is something to be said for trying this.

I never put this battery back in the van, and instead into a battery box to work as a bench battery and it is not one I would choose to actually rely on, but doing that high voltage recharge did change it from a large paperweight to a usable 12V energy source.

Sounds like me, not quite ready or in my case have enough £££ to upgrade battery etc.
So today I took the said battery out and put on the pulse charger - like I say not expecting miracles but worth a try.
The destruction manual says leave it for 24hrs....

 

[AlyJay]

Indeed so either it was wiring to 2 multi meters/ measurement error or simply completely flat but it wasn't a battery that had aged and had poor capacity that got fixed by a BS/smoke and mirrors/snake oil battery reviver Kev.... that's my point mate

Should I try snake oil?

 

[Pudsey Bear]

Good for arthritis n gout.

 

[AlyJay]

Yeah, so battery charger fully charged battery then turned off, within a minute back down to 10.9 V on multimetre so definitely knackered.
Now to find a reasonably priced gel battery that will fit in hole with same teminal orientation.

 

[Pudsey Bear]

Alpha batteries use the forum discount.

 

[merl]

Now to find a reasonably priced gel battery

You could try a bigger bottle?

 

[wildebus]

Yeah, so battery charger fully charged battery then turned off, within a minute back down to 10.9 V on multimetre so definitely knackered.
Now to find a reasonably priced gel battery that will fit in hole with same teminal orientation.

I would say the battery is actually perfectly good on 5 cells, but the 6th is knakered for whatever reason, so nothing you can do short of taking the battery apart and physically repairing the failed cell will sort it.
(this is the kind of repair you see done in Indian street repair shops but not here).