Quote:
Originally Posted by theremart
I am finding that to get old batteries to achieve high voltages that I have had to leave them on the SSG for days at a time.
The golf cart batteries that I have when I got them were at 12.20 V. I thought this was fully charged, until I did some searching and asking around, it seems that when on a charger the top voltage is 14.00 - 14.2.
I have taken a more aggressive approach with these batteries, I am now hitting them with 40V at .8 Amp. They have risen now after about 3 days to a charging 12.34-12.54, the highest voltage I have seen these at since I have had them. I am thinking that I have never really had these batteries to the full charge they are able to do, thus this is why I was unable to run my rotoverter off of them.
I believe that I will keep these batteries on my 7 transistor monopole energizer for a week or so at 40V. I am seeing a steady rise in voltage with these batteries about .05 a day.
My target is to get supercharged batteries. This is a battery that can take a charge quickly and then when loaded slowly go down in voltage. I have taken the long route to get there with sulfated batteries...
Mart
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Hi Mart,
You might wanna try hitting those batteries with a higher amperage than 800 milliamps but be careful as the transistors will heat up so make sure you have heatsinks on them and I personally like a fan on them.I find that the batteries charge better if you hit them with higher amperage for a little while,Another words hit them for maybe 5 or 10 minutes at about 1.5 amps then let them return to 800 or even 500 milliamps for say 15 minutes and i think you'll notice the batteries tend to like this sort of charging.Hope that helps and I thought those batteries were 6 volt golf cart batteries?.
-Gary