[HomeBrew] Max Charge Rate for GE Batts ?

[GreenTree Ground Station]

Need to know MAX charge rate/volt/time for GE
MPR Series HT - P2CJJ66HKM (KT168-C / ER110-C)
NiCad battery pack.  Pack measures 3 1/2" tall,
2 5/8" wide, 1 1/2" thick, twistloc, grey in
color, no markings/nomen, 3 busswire type conn
on back 1" long, 1 on left / 2 on right viewed
from back on pack.  Not sure of pack output V.

Currently charging @ apx 8.5vdc 50 mA (trickle?)

Need same info for Multiplier 7.5v NiCad M522G4B.
    (used with GE Hi-Power MVP (66KF?FHX))

Any info appreciated.  Don't want an explosion.

Bruce

PS: Anyone have a desktop drop-in charger
    available for either of these batteries ?