welp, that there be a glitch in ya circuit kurmaran, but didn't want to point it out just yet... thats a very nice circuit indeed you got there!!!!
well anyhow, when you only pulse one side of the coil, the output is not like a sine wave, it is only half of a sine wave.
so you can see it charge up and bend over, but the discharge will drop fast off that inductor you got there. so what needs to be done is you gonna have to get that other side of the sine thats lost threw the coil discharge time. to do this, you pulse the coil both ways! this way you have a true sine wave!
ya see, when the coil charges, that half of the sine wave is good, but the cell dont use that half.....
when the coil discharges, this is the half the cell see's, and that half is not half a sine wave, it looks much more like a capacitor discharge wave. this will have to be fixed for this to work they way it should.
now you get 3 of these discharge sine waves together,,, and you forcing amps in, more amps than the cell will usually take! you also got a harmonic at a particular frequency, now this is not pure dc, THATS WHY ITS SO GOOD.
its like changing the batterys very very fast, accept a battery dont have spring action like a coil!
sleep on this..