Just got a Chun Smart Cahrger from Batteryspace.com for my 12V 4Ah LiMH laptop pack.
I had been charginging it with the wallwart that it came with.
The wallwart got warm, and so did the batteries(ouch). It took 12 hours to full charge and I had to use a light timer to be sure not to overcharge it.
The SmartCharger takes about 3 hours, and turns itself off. Everything stayed cool, charger and especially the batteries.
Heat is the battery killer, especially from the inside out.
Thanks you Dr.Chun ! All You Volts Belong to Me !