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Battery Life Extending Machines ?? restoring for lead-acid

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Kiriakos-GR:
Probably I am effected by the panic syndrome, because the battery of my motorcycle YTZ7S (Yuasa) shows some signs of damage in just two years time, if I need to use the starter for 2-3 minutes , it falls apart = below the 11V mark.

And so by looking on the web found this  charger, that promises to restore lead-acid batteries.
http://www.accutherm.com.tw/index.asp?lang=2

And the big question is : does any of those devices really work ? 

Once I had read that there is a way to add some chemicals in the battery, like internal wash, and there was a chance to recover,
and filled back with electrolyte.
But this cure was about large sized batteries found in tractors.

   
 


Balaur:
I'm using an older CTEK charger that also have some battery recondition features (desulphation). The current battery on my car has 5 years.
I've also bought one for my parents and they use that to maintain their car battery in very tough conditions.

My opinion is that these (or better) chargers are quite useful in maintaining the battery for a very long lifetime if other conditions are met as well such as the car/bike charging circuitry are functioning correctly. I find them strictly indispensable in my case (I'm not using the car too much - maybe one short trip/week + long vacations). Short trips and long inactivity periods are bad for battery lifetime.

I'm not really sure whether they will be able to rehabilitate bad batteries. One can always try.

As always, please check whether the battery is charged correctly in your motorcycle, i.e.: typical 3-step charge with constant current, overvoltage 14.2~14.5V then drop to ~12-13V or a much more common flat slight-overvoltage (13.2V~13.6V)

If that's OK, then maybe the battery is sulphated. An "intelligent" charger could be used to restore the battery to a better performance level.

I could recommend you to buy a good charger such as one of the CTEK units since I find that a charger is very useful. However, please don't lessen to me as I have an unnatural fascination with rechargeable battery stuff.

bilko:
From the brochure http://www.yuasa.com.au/files/All_PDFs/YTZ_Yuasa_Brochure.pdf it appears that this battery uses AGM technology. This means that the battery is sealed and that the acid is held between the matting. The battery extending technology is used for normal lead acid, which are prone to sulphation (spelling?). The AGM technology is not supposed to lose water except when overcharged or operating at high temperatures. They have hydrogen oxygen gas re-combiners that produce water from the normal gasses given off. If the battery is overcharged, a vent prevents excessive pressure in the case and the gas is lost to the atmosphere. It is possible that the battery has lost some water.
If the battery is fully charged, you can check the Ah capacity using a constant current load set at a 20'th of the charge rate. If the battery gives less than the Ah rate then it is probably nearing the end of its useful life. Many batteries are replaced when the Ah rating gets to around 50%. Check this link, it may be relevant http://www.spokanister.net/ktm_Yuasa_YTZ7S.html

Jimmy:
My Uncle until he retired recently was the CEO of one of the car batt manufactures in AU. Batteries now days are made to last 3 years they have made the lead plates as thin as they can to save costs and increase profit.  The lead plates in the batt corrode and can pitt sometime the plate can crack in half reducing the Ah capacity. Pull it apart and have a look at the inside plates and replace plates if needed. You will probably have to make the plates yourself. I would not buy an electronic device that claims to rejuvenate a battery when it is probably a physical problem like the plate flaking 1 little flake and shorting a cell which reduces the voltage. 

Balaur:

--- Quote from: yachtronics on October 06, 2011, 12:03:38 am ---The battery extending technology is used for normal lead acid, which are prone to sulphation (spelling?).

--- End quote ---

All lead-based batteries may suffer for sulf(ph)ation issues when left partially charged for some time. That may have drastic consequences such as failing to reach the expected lifetime. Some usually quoted figures talk about the fact that only 30% of car batteries reach a 48 month mark and that 8 of 10 batteries are affected by sulfation build up. (Citation required). That's why I've replaced my 2 year-old car battery when I didn't knew how to properly maintain it.

The specific structure of Gel batteries makes them very resistant to this effect but not immune. AGM batteries are definitely better than wet cells but still vulnerable.

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