thanks you guys for the advice and suggestions,
yes, a large capacitor is extremely dangerous and possibly fatal if misused and abused.
I'm pretty able to build a properly insulated and safe casing for the internals, and I was thinking of using a readily available cell holder for the cell.
What I'll be hoping to do is to zap a new cell at 80-90V,
older cells at less voltage.
What I need is a list of components and the wiring/circuitry drawing.
If there are those who has it, please share it, thanks and HAPPY NEW YEAR!
But yes, if a brand new zapper is in the region of US$100, i might well be better off just buying one! I know of some capacitors (0.1F) costing almost that much.