While it's permissible to use a NiCd charger, you should not leave these battery packs on the charger for extended periods of time. They should be removed as soon as the indicator light shows "charged". The reason behind this is that the "Trickle Charge" rate of that specific charger is designed for a NiCd battery pack, so it's a hair too steep for NiMH. If these packs were left on the charger for extended periods of time (overnight to several days), the high trickle charge rate could overcharge the batteries, and would essential "bleed" off capacity. That leads to accelerated wear on the cell chemistry and decreased cycle life. On a side note, even NiCd battery packs should not be left on this charger for extended periods of time. That inevitably leads to "memory effect" and decreased lifespan of the pack.
UPGRADED Replacement 12V 3.8Ah NiMH Battery
Replace DeWALT original battery: DE9074, DC9071, DE9037, DE9071, DE9075, DW9071, DW9072, DW9074
Fit DeWALT Tools: DW953K, DW052K, DC740KA, DC981K, 25453, DC528, DW053K-2, DW904, DW904K, DW917, DW940K-2, DW980, DW968K-2, DW979K-2, DW915, DC727, DC756, DC980, DC981, DW051, DW052, DW053, DW907, DW953, DW965, DW972, DW981
Will your charger work with an upgraded NiMH replacement?