
271Appendix B: Batteries
Bodies are dynamic, mobile vessels in which we travel through the world. It
is because of our transient nature that wearables require a portable power
source. This power source most commonly takes the form of batteries.
Here are a few things you need to know about batteries:
• Batteries convert chemical energy to electrical energy.
• There are two types of batteries: primary (single use) and secondary
(rechargeable).
• Even within the same battery type, voltage and capacity ...