How to build a Desulfating Capacitive Battery Charger, Complete with Diagram Start to Finish

How to build a Capacitive Battery Charger, Complete with Diagram Start to Finish
How to build a Capacitive Battery Charger. For parts, or to purchase complete units, please call 414-852-7526

In this video I cover how you can build your own capacitive battery charger. These low cost chargers are universal, and can charge a battery bank from 0-170v in size. They also have the properties of Desulfation, and can either reverse, or prevent sulfation build up with regular use.

Build it Yourself Recommended Parts List!
12 Hr Timer:
Multimeter/Volt Meter:
Extension Cord:


Lead–acid Battery desulfation with capacitors no Epsom salt required. Cheap capacitive battery charger using a rectifier and capacitor, which is much more efficient for charging your worn out sulfated batteries. Also great for use as a forklift battery charger at a much much lower cost then purchasing a factory built one for $3,000+

  • Don't effing teach me how to build a BOX mfer or how I should put it all together … I'M an effing engineer … I want DETAILS cad drawings part numbers etc etc etc … From what I got from your video it is how to build a non functional box made of wood. You didn't even test it !!!

  • Again at the end of vid schematic NO values given for cap no part numbers for any of it … very poor engineering protocol. Unless of course you had no intention of giving this info away in the first place. I now know this is a scam.

  • I tried all different combo's of cap values and NONE of them worked .. high … low … and all in between …nothin worked. Kept tripping the main breaker on my house box.

  • Too bad you went thru all that trouble to make a nice box and all but like I said the damned thing doesn't work and to boot is a safety hazard. It is quite interesting that you don't specify what the cap value is voltage wise and uF wise and don't spec the bridge either. No one has ever said if one has to hook this contrap up to a 40 amp breaker or not otherwise you trip breakers while using it … is this a slight of hand ? Sure … teach em how to build it but don't give them quite enough info to make the thing work. There is no way this thing should be drawing more than 10 amps. I can run a regular smart charger at 12 amps and NOT blow my breaker rated at 10 amps … go figure that one out Mr. Electronics expert. This thing is a hazard …

  • Sorry dude doesn't work. I built one and all it did after boiling my battery for a while ( 20 mins) was to get the charge up to about 11.5 volts and then kept kicking the 10 AMP BREAKER ON MY BOX after that . I had two 12uF ac start caps in parallel for about 25uF which should give me a 1 amp charge current at about 170 volts. I'll admit that that first 20 or 30 mins on and off got the bat back to some life … 11 plus volts but after that it kept kicking the breaker drawing more than 10 amps. This design does NOT work. It needs serious current limiting which the caps do NOT provide as most have stated they do. I don't know what you guys are trying to prove here but t doesn't work as a bat charger. It may desulphate some cells at such high currents and voltages but after a short time the bat regains a lower internal resistance and starts drawing enormous amounts of current. I made an old school dumb charger after I blasted the bat with this contraption and even it died from current overload. The transformer burned up. I don't what you guys are thinking here ??? Think about it … AC mains at 120 VAC into a bridge should give around 160-170 VDC. I agree that higher voltages WILL break down the sulphation bridges and remove much of the surface sulphation BUT once that has happened the currnet draw becomes far too much and fries the charger or kicks the breaker in my case even after a very short time.
    This 170 volts DC is far too much … you only need about 50 max and in pulses at about 30 kHz. Best frequency would be adjusted to that of the break down of Lead Sulphate crystals. You NERDS are out of control … better think this out a little more.

  • You mentioned you could build these for a fee I will be in Arizona in January would you be able to build two chargers for me complete with multimeters and ship to AZ.? If so please contact me at Thanks

  • Would this desulfate just as well with a circuit using a transformer with the secondary of around 16-20vac feeding the full wave bridge rectifier? This would be for 12 volts or less batteries. The current limiting capacitor would be put in one of the primary
    leads of the transformer. Have you used your circuit with 80uf cap on smaller less current batteries like 12/7amps and
    if so are you concerned to much current is available should cells be shorted in the battery? Thanks, Ken

  • not feeling comfortable with that high voltages going to batteries, things can easy go wrong, much more safety is needed. i am electrician myself over 30 years, people with no experiance could better keep away from this experiments and give some bugs to a electronic digital charger out of factory

Leave a Reply

Your email address will not be published. Required fields are marked *