Joe Analssandrini wrote:

Do not even consider NiCads. They are a "pain." I used them for years
and, when NiMHs came out and I tried them, I went over completely to
using NiMHs. There are just too many advantages of NiMHs over NiCads -
the most notable being virtually no "memory" effect. You can charge
NiMHs any time you like and, while they should be "conditioned"
(discharging completely and then recharging) once in a great while, in
general that annoying step can be skipped.

The downside to NiMH's is they self discharge faster when not in use
than NiCd's.