1.   The study says that recycling of nickel cadmium batteries is essential both to alleviate supply problems and to prevent contamination of the environment.

2.   A Li-Ion battery can cost as much as four times what a nickel cadmium battery would cost.

3.   Depending on how they are used, they can run longer on a charge than comparable-size nickel metal hydride batteries.

4.   In other words, a light powered by polycrystalline silicon photovoltaic cells that power the rechargeable nickel cadmium batteries.

5.   The change is to swap nickel metal hydride batteries, or NiMHs, for the old-fashioned lead-acid kind.

6.   The company said the new facilities also will meet the projected growth in demand for nickel rechargeable consumer batteries in Asia, North America and Europe.

7.   The car used nickel metal hydride batteries, a type that is already common in laptop computers.

8.   The nickel hydride battery is made of environmentally safe materials and holds a charge longer than conventional lead acid batteries.

9.   They are less likely to suffer the memory effect and pose less of an environmental problem than nickel cadmium batteries.

10.   This makes them more susceptible to short-circuiting if exposed to moisture than nickel metal hydride batteries.