Dry cell batteries are a common type of power source. Tiny dry cell batteries are sometimes called button batteries.
This article discusses poisoning from a dry cell battery (including button batteries). Poisoning occurs when a person is exposed to the chemicals inside the battery.
Batteries - dry cell; Button batteries
Dry cell batteries are used to power a variety of different items. Small dry cell batteries may be used to power watches and calculators, while larger ones (for example, size "D" batteries) can be used in items such as flashlights.