Final answer:
A common example of a battery is a button battery, which can power small electronic devices like calculators and cell phones.
Step-by-step explanation:
A common example of a battery is a button battery. Button batteries are small batteries that can power small electronic devices, such as calculators and cell phones. These batteries can be as small as 5 mm across.
An example of a battery is a button battery, commonly used in watches and calculators. These batteries are based on chemical reactions like the alkaline dry-cell reaction or silver oxide-based reaction. The flashlight battery test illustrates the impact of battery life on device performance.
An example of a battery is a small button battery used to power devices like watches, calculators, and some medical devices such as pacemakers. Button batteries are compact and can range in size, some being as small as 5 mm across. The chemical reactions that enable these batteries to produce electricity are typically based on two popular redox reactions: the alkaline dry-cell reaction and a silver oxide-based reaction. Alkaline button batteries are commonly used because they offer a good balance between cost and energy output, while silver oxide batteries provide a higher voltage and longer life, making them suitable for applications like wristwatches where a constant voltage is needed.
Batteries, in general, are crucial in everyday life and can come in many forms, from the very small to the very large, each designed for specific applications and power needs. While modern electronic devices typically use rechargeable batteries, button batteries are often designed for single-use due to their small size and energy capacity.
When selecting a battery for any application, considerations such as the mass of the battery, its cost, reliability, and current capacity are taken into account to ensure that the chosen battery fits the intended use. For instance, a car battery, which is about 1% of the mass of an average car or light-duty truck, would be impractical for use in a smartphone due to its mass.
Take-Home Experiment: Flashlight Batteries
A practical experiment to understand how batteries work is the flashlight battery test. By using new and old batteries in a flashlight, one can observe the differences in brightness due to the varying energy levels of the batteries. This experiment illustrates the effects of battery life on the performance of electronic devices and the importance of using new batteries when you are limited in the number available.