Here is some interesting info about gel electrolyte n cells: http://www.ehow.com/how-does_5041186...tery-work.html
Dominus
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Thanks Bob,
Here is some interesting info about gel electrolyte n cells: http://www.ehow.com/how-does_5041186...tery-work.html
Here is some interesting info about gel electrolyte n cells: http://www.ehow.com/how-does_5041186...tery-work.html
BroMikey wrote:
I have a set of gel cells and they are jello compound trapping acid. They are Lead Acid. When these batteries need to be reconditioned this means that some of the gel is probably missing from the plates. I add ALUM, I don't care why I am not suppose to do it, I did it and it works.
Gel cells will start working better if you add electrolyte, or else why would my cells have very large screw off caps right? Add acid if you must I don't.
I never read anything and just added ALUM to the cells, when they are charged the Acid leaves the top in overflow and if need be I will overfill and charge and let them run over till I have what I want.
ALUM BATTERY that was an ACID battery.
Try it, the worst that can happen is that the battery will do alot better. My gel cells were overfilled and set on constant current til the plates are reforming. The ALUM must be heavy and the ACID must be lighter because like I said what runs over is ACID released from the gel.
I recently did this to two 50ah gel cells and two 30ah. They all went up the long slow way that all converted ALUM batteries do this is how I know it worked.
Mikey
Not sure about doing the Alum conversion to them yet.
I know Alums have lower voltage and deliver current much more steadily across the discharge voltage curve. That makes them pretty useless for powering loads with an inverter.
Is there any good link for these questions?
1. Do ALUM conversions increase the Ah?
2. (And/or) What makes an alum conversion superior to lead-acid?
Yes: http://www.hho4free.com/bedini_alkaline_battery.htm
Anyway, when discharging the batt, it stabilizes @8.5V or even goes up and down there while under load. The next charge takes longer, as well as the consecutive discharge.
Manufacturer recommends very long charging times at 14.1-14.4V
I´m making a pseudo topping-event at 14.8, by this I mean I disconnect the charger.
Both methods won´t give them a topping charge, but capacity is rising by going up & down.
This is the battery

And this is how the caps look like. Will have to find a tool that fits in there, eventually..
Anyway, nice info about Gel's
Now I know really well why I have to stay far far away next time I stumble upon such a maintenance free sucker ^^
Now I know really well why I have to stay far far away next time I stumble upon such a maintenance free sucker ^^
Gel cells and rejuvenation techniques are quite contradictory...
You'd like to push them very high but they start making bad digestion sounds
Too much and they'll boil dry. On the other hand you get more water into the Gel-mass by desulphating, because it´s stuck in the chemical structure!!
I should build a window into the side of these batteries to see how it looks like
Some years ago I heard that when you boil them, the bubbles stay in the gel and mess it up
You'd like to push them very high but they start making bad digestion sounds

Too much and they'll boil dry. On the other hand you get more water into the Gel-mass by desulphating, because it´s stuck in the chemical structure!!
I should build a window into the side of these batteries to see how it looks like
Some years ago I heard that when you boil them, the bubbles stay in the gel and mess it up
Thanks guys!
I wasn't even sure about these 14.8 - yes, the difference can be heard from 14,9-15V up.
I'm using John's chargers as my SS are waiting one transistor+crocodile-clip experiments, and my SG-wheel is approaching it's final building stage.
The 10A12 is more gentle at pushing the voltage at the top than the 2A12-3. Less amps mean better structure on the plates...
D.
I wasn't even sure about these 14.8 - yes, the difference can be heard from 14,9-15V up.
I'm using John's chargers as my SS are waiting one transistor+crocodile-clip experiments, and my SG-wheel is approaching it's final building stage.
The 10A12 is more gentle at pushing the voltage at the top than the 2A12-3. Less amps mean better structure on the plates...
D.
I'm rejuvenating 2 gel cells, because they were expensive, and they have made very few cycles 
196Ah@C20
I think their main problem is undercharging. And stood there for some years too...
Pushing to 15V sometimes but I think I will be stopping before 14.8 or earlier the next cycles.

196Ah@C20
I think their main problem is undercharging. And stood there for some years too...
Pushing to 15V sometimes but I think I will be stopping before 14.8 or earlier the next cycles.
Yes - I already flooded it haha! The white mass which I thought of as extreme sulphation must have been the glass mat.
I already got a lot of similar, 4Ah and 12Ah batts, all AGM's. LOL! That was before reading your post
P. Lindemann said on a video that there's little gassing with the chargers they make - so capdumping may be good for AGM's
I don't know if all their chargers use dumping, but the smaller ones do.
You can create the exactly right dilution and then floodfill them up, right?
I already got a lot of similar, 4Ah and 12Ah batts, all AGM's. LOL! That was before reading your post
P. Lindemann said on a video that there's little gassing with the chargers they make - so capdumping may be good for AGM's
I don't know if all their chargers use dumping, but the smaller ones do.
You can create the exactly right dilution and then floodfill them up, right?
Thanks for replying..
Its a 4,5Ah/12V and I started desulphation at 8 Volts. After a few cycles I realized it may be dry and added distilled water with a syringe.
It is hard to look inside because the holes are so small, but it looks very sulphated, white as snow.
Is C20 for charging, discharging or both?
Its a 4,5Ah/12V and I started desulphation at 8 Volts. After a few cycles I realized it may be dry and added distilled water with a syringe.
It is hard to look inside because the holes are so small, but it looks very sulphated, white as snow.
Is C20 for charging, discharging or both?
what is that VOLTAGE?