🚀 go-pugleaf

Hello.
Can anybody out there help me locate a transformer (or power supply)
that is capable of supply ~15Volts and a LOT of current? (around
20 - 30 amps).  By the way, it also needs to be reasonably priced,
less than $100.00  What I am attempting to do is build a rapid charger
for NiCd batteries that is capable of doing 4 or 5 at a time.  I would
like the charger to be compact and don't want to put in several transformers.

Thanks for any help!
-Rod Meyer