audioguru, NiCad's are still widely used, virtually every cheap cordless phone still uses NiCad packs, they're also still widley used in RC cars because of their extreme ability to dump current especially in C and D cell sizes. High capacity NiMH's are 2500, but standard NiMh's are 1800ma, the walls and internal electrodes are thinner on the higher capacity cells. Lower capacity cells are more durable because the electrodes are thicker and less prone to oxidizing.