Which of the following types of batteries are used by toys and watches?

A.
Silver oxide

B.
Zinc-air

C.
Lead-acid

D.
Silver lead

Explanation:

The Silver oxide batteries are used in toys and watches. These batteries can become highly
hazardous at the end of their useful life. After a period of use (approximately five years), the
batteries may begin to leak their contents which contain mercury, posing a serious health risk.
Answer option C is incorrect. The Lead-acid batteries are used in Car, Golf Cart, UPS, Industrial ForkLift, Motorcycle, etc.
Answer option B is incorrect. The Zinc-air batteries are used in hearing aids and in older cameras that
previously used mercury batteries.
Answer option D is incorrect. There is no such battery as Silver lead.
Reference: “http://en.wikipedia.org/wiki/Battery_recycling#Types_of_batteries”