> I have a 6 cell NiCad battery pak from DigiKey listed as 7.2V 2800 MAH NICAD.
>
> What voltage and current would best charge this type of pack?
>
> (trickle & fast)

Unless they are rated for fast, you should probably avoid anything faster
than 700mA for 5 to 6 hours. Typical charging is 280mA for 14 or 15 hours.

Keep them cool - you can double the lifetime if you keep them cool while
charging.

Cheers,
Bob