One of the problems is that it is difficult to measure exactly what is happening.

Measuring joules into the system from the input battery vs. joules out of the batteries you charge on output is the only way to do a fair comparison. Basically work in vs. work out.

On an oscillator that I posted in this forum charging a cap bank and discharging on the neg side through scr into dead battery, that gave me the best results I ever got.

It brought back some gel cell batts that wouldn't hold a charge. The first charge I gave to the batt, the batt would only power a load for about 5 minutes until the voltage came down to 12.00 volts. Then I recharged up the same voltage and discharged down to 12 volts. By the 15th or so charge up, the same battery would power the same load for over 50 minutes. 10 times longer than the first time.

About 6 years ago, I was charging a cap bank with this same coil but not oscillating..using bicycle wheel to charge caps to a few hundred thousand uf at about 15 volts. The cap was discharged by a mechanical pulley/switch setup. After charging for about an hour, I could turn everything off and the battery would continue to climb in voltage for an entire HOUR! Bearden says it is the lead ions momentum continuing to move, but no matter what, it is a very desirable thing.

Anyway, on the oscillator, calculating joules in even giving the benefit of the doubt and considering the input to be 100% duty cycle...and comparing to 100% duty cycle discharge of output batts through load, it showed me that there were more joules that came out the backend than what went on. So the input is not 100% duty cycle so it is even better than what I noted.

I measured input volts X amps = watts. watts X seconds are watt seconds or joules. so if 13 volts @ 0.1amps = 1.3 watts, 1.3 watts X 60 seconds per minute = 78 joules per minute X minutes of input power. I did not account for a duty cycle to divide that by...just left it at 100% duty cycle. I took readings about every 15 minutes time frames.

Same type of calculation on output powering load and joules in were less than joules out...based only on THIS particular method of how I calculated it. It may not be accurate but I think it is very straight forward.

Also, on the rotor versions, when the circuit is in resonance, the wheel is basically spinning for free. People usually fail to even include work done by wheel. If you put in 10 parts and get back 8 parts in recovery and the wheel is spinning the whole time. 2 parts is the net input but the wheel is producing a lot more than 2 parts work.