Originally posted by dosdan 
No. Ni-Cd is prone to the memory effect. Ni-MH & Li-ion are not.
In fact, the Ni-Cd memory effect is mostly a myth - It can be seen in a strictly controlled lab environment, but not in the real world.
The problem is that many Ni-Cd chargers use timer-based charge termination - So if the battery is not fully discharged the charger will overcharge it, damaging the battery. This gets misinterpreted by many as "memory".
NiMHs almost require proper charge termination because it's a lot easier to damage them by overcharging, so nearly all chargers use temperature or negative delta-V detection.
Li-Ions are even more finicky about overcharging (BOOM), so all are charged using smart chargers that won't overcharge them.
I strongly reccommend getting a GOOD charger (a MaHa or LaCrosse are your best bets) for your NiMHs. At the very least you need one with independent charging channels.
And I'm at work
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