Apple QuickTake 150 (for Windows) - Manual (Page 66)

Ways to improve battery performance
Here are some tips that may help you get the most from your batteries.
m For longest battery life, use lithium batteries.
m When you replace used batteries, replace all the old ones with new ones.
Mixing new and used batteries weakens the performance of the new ones.
(If you are using rechargeable NiCad batteries, replace batteries that are
running low with a complete set of fully charged batteries.)
m Batteries work best when the contact surfaces are clean. If necessary, clean
these surfaces by gently rubbing with a clean pencil eraser or a cloth.
WARNING Damaged nickel-cadmium (NiCad) batteries may leak small
amounts of potassium hydroxide. This substance can cause severe burns
to the skin and eyes. If you touch a damaged battery, immediately rinse
your hands and any other affected areas with water for at least 5
minutes. Do not use soap.
58 Appendix B