There’s been a fire. Your job is to figure out where the fire started, and how.
Fire safety is a complex problem without a single answer. Learn how to engineer and design fire safe spaces.
Safe and sustainable cities will depend on lithium-ion batteries to power our modern lives. But what are the costs?
From hoverboards to cell phones, portable electrical power makes life as we know it possible. But it can come with some dangerous possibilities. Let’s investigate, experiment and search for solutions.
Lithium-ion batteries are not the only kinds of batteries that people use. Here, you can observe some of the internal structures in an alkaline battery, a common type of battery.
In this example, the alkaline battery has a “bobbin” construction.
Explore this interactive to compare this Alkaline battery to a lithium-ion battery.
touch_app Interactive
touch_app Interactive
explore Guide
explore Guide
© 2025 Underwriters Laboratories Inc. All rights reserved.