Please help with battery desulfator circuit

Greetings,
I'm going to build the battery desulfator circuit described here:
www.shaka.com/~kalepa/n_channel_schem.gif . Looking at the schematic
it appears that C1 and C2 are electrolytic capacitors. Can the other
capacitors be disc ceramics? Or is there a better choice? Finally,
what kind of device is Q1?
Thank You,
Eric R Snow

 

Make that C1 and C4.

I doubt that any of these are critical. Ceramic, of film should do
fine. If you use ceramic, just use ones that have a voltage rating at
least double the expected voltage. Some kinds of ceramic caps have a
big drop off of capacitance as the rated voltage is approached.

It is a metal (gate) oxide isolated field effect transistor, N channel
(positive gate voltage turn on).

http://www.irf.com/product-info/datasheets/data/irfz44v.pdf

 

Thanks John. And I really meany C1 and C4 but somehow my finger typed
C2. Hmmm.... Can you tell me if this device from Fairchild will work
instead of the IR part? www.fairchildsemi.com/ds/HU/HUF75333P3.pdf .
Mouser doesn't carry the IR part and I don't know enough to decide
which of 33 Fairchild parts will work. Also, Do you know of an on-line
source that expalins how to wind your own inductors accurately and for
a novice? I've looked but haven't had any luck.
Cheers,
Eric