Ok,the guy wanted to know how to maintain the NiCd pack he ALREADY HAS.
It's best if you recharge before putting the item away;don't store NiCds if
they are depleted.

That's not true. If your objective is to maximize the life of a Ni-Cad
and you are willing to not have a battery in a ready state of use then
the below would be the proper way to store the battery.

Run the tool until the battery is drained. With a Ni-Cad that would
be when the motor noticeably slows. Store it in this condition if it
will not be used for over a month. After long periods of storage the
first charge will be of a lower capacity but after a few charges its
capacity will become normal.

Things that can harm Ni-Cads a

Over discharging
Over heating
Over doing the charge/discharge cycles.