Still on batteries...

aussie_paul · Guru

Still on batteries...

rockylizard · Guru

Gday...

I hadn't heard of VRLA either Paul .... Mr Google helped -

http://en.wikipedia.org/wiki/VRLA_battery

Cheers - John

aussie_paul · Guru

rockylizard wrote:
Gday...
I hadn't heard of VRLA either Paul .... Mr Google helped -
http://en.wikipedia.org/wiki/VRLA_battery
Cheers - John

Ok, I had looked there John, BUT wanted "users" knowledge. I checked and my van battery has printed on it "valve regulated lead acid". So the battery I am looking at is advertised as AGM and has VRLA printed on the battery. Sounds to me like a good match fro my second battery.

Aussie Paul. smile

oldtrack123 · Guru

aussie_paul wrote:
VRLA and AGM batteries, what is the difference please? I see an advert for an AGM battery and the pic of the it has VRLA printed on the battery.
Aussie Paul.

HI

Agm battteries are valve regulated

They do not have any liquid Electrolte as with Flooded Lead acis batterries

But gas preesures can build up especially if being over charged

The VALVES regulate that Discharge of GAS prsesure to mimise the risk of explosion due to gas pressure

PeterQ

Brenda and Alan · Guru

Paul one thing has not been mentioned with regard to pairing batteries into a parallel bank. Both batteries MUST be of the same type of construction and chemistry or one will discharge into the other over time. Ideally it is best to use two or more identical batteries.
Alan

aussie_paul · Guru

Brenda and Alan wrote:
Paul one thing has not been mentioned with regard to pairing batteries into a parallel bank. Both batteries MUST be of the same type of construction and chemistry or one will discharge into the other over time. Ideally it is best to use two or more identical batteries.
Alan

For sure Alan, I think I will have two that are very close. Then, down the track when they need replacing I can buy two identical batteries with the latest technology.

Aussie Paul. smile

PeterD · Guru

VRLA batteries come in both GEL and AGM types. There is no such thing as a sealed battery, no matter what the salesmen tell you. All batteries will build up dangerous pressures when charge currents get too high, particularly when they enter a runaway condition. That is why engineering types recommend that no battery is safe to be installed in living spaces. If your battery charger goes ape the battery runaway conditions will boil off dangerous components from the electrolyte. This is exactly the same as happens in flooded batteries. That is why the batteries can not be sealed.