If you don't want to worry about leaking replacement batteries, then use NiMh battery instead of Nicad. Much less harmfull. I should take my own advice too, but I used a Nicad. I will check up on it in a year or so. My a500+ i just removed the old battery. there is some leakage from when i got my a4000 but i think its not permanent damage and i have cleaned the mb as much as possible.
