Earlier wrote up a bit about questing for: Lead acid battery reconditioning on my EVT 4000 - PulseTech versus Battery Life Saver? ... and have some positive results to report.
I got some PulseTech units and have had a 12v unit hooked up to the four 12v50ah batteries. They were wired in parallel, of course. The last time I'd ridden the EVT 4000 it barely had any speed or range and that was with the pack supposedly fully charged. If you read the above post I tell that I installed a set of 12v 18ah batteries that were lying around, and found it had full speed with those relatively new batteries. That indicated the scooter didn't have any electrical or mechanical problem, it was the batteries.
Both the PulseTech and Battery Life Saver units take a smidgeon of power from the battery pack and send out a pulsing wave form. Supposedly the wave form has the right frequency signature to target dissolving the sulfate crystals. Sulfation is part of what causes lead acid batteries to die, and the theory is dissolving the sulfation extends the battery pack life.
As I said, the batteries were connected in parallel so it'd be a 12v pack, and I had a 12v PulseTech connected across the pack. Because the PulseTech takes some power, I also connected a 12v SLA charger to the pack. That way the PulseTech could take power, but the charger kept the pack pegged at full.
It's been approx 2 months now ... yesterday took the pack apart and reinstalled it in the EVT 4000.
Very good. It has full speed now - whereas before it was more like 20 miles/hr max using these same batteries. Range is difficult to tell because the odometer doesn't read accurately. IIRC the accurate number is 1/2 whatever is shown on the odometer. Yesterday I rode it for approx 20 indicated units, or about 10 miles. Today I rode it for approx 24 indicated units or 12 miles. At the end of todays ride the pack read 47.7 volts and the dashboard indicator was behaving right for that voltage level.
IIRC the best this particular pack ever did was 15 miles anyway. In any case the 10+ miles it gives right now is more than enough for my commute.
That is very interesting.
It is however difficult to be certain about the effect of the desulphator, because you had no control group for your experiment.
The long charge might also have had some effect all by itself.
I have a similar gizmo lying around somewhere from about 10 years ago. Maybe I'll do some experimenting, now that I have various kinds of battery testing equipment lying about....
This information may be used entirely at your own risk.
There is always a way if there is no other way!
So where do I get one?
WHo dares, WINS!!!!
Look in the vendor directory: Battery Management or Monitoring System
- David Herron, The Long Tail Pipe, davidherron.com, 7gen.com, What is Reiki
I don't have a PulseTech desulfinator, I bought one from ebay from a seller called Wizbang. I bought a currietech bike locally via CL and the batteries had not been treated well. I checked the bike to make sure no mech. problems with a local vendor and he said I needed new batteries (the Old Batteries). Before I got smarter bought 2x batteries to replace the existing (the New Batteries) . I then read up went looking about rehabing the older batteries and then went looking for a desulfinator. I got the desulfinator from Wizbang from ebay. I left the Old Batteries on for 4x weeks. I then charged them separately on a standard 12 v charger. I switched out the now 8 week New Batteries for the refreshed Old Batteries. I wondered but the now refreshed Old Batteries worked better than the New Batteries. More pep and longer legs. Voltage held longer. Sorry data dudes, no hard data to share just the observations of a lay person. The only "test" I did was to take both sets of batteries out and separately charge them on two 12 v. chargers. Ran one set one day on my daily commute and then then others the next day. Again same result the refreshed Old Batteries out performed the New Batteries.
Hopefully not viewed as a plug for wizbang, but just my observations. I now have the New Batteries on the desulfinator and will see what happens in about 4 weeks. Seems like I might be doing this switch periodically to deal with the SLA's.
Matt