So why do batteries swell? Lithium-ion batteries create a chemical reaction that generates power for modern electronics. However, as a battery ages the chemical reaction that occurs inside the battery no longer completes as intended, which results in the creation of gas. In more technical terms
Charging your phone to just 80 percent means a healthier battery in the long run. And, yes, it works for Android phones, too.
The battery tech that powers most of our smartphones hasn’t changed much in the past few decades, but common knowledge about how to keep them in tip-top shape? That’s even worse. Here are the top five most common smartphone battery-life myths that need to die if you want to prolong your phone's overall lifespan, straight from the world’s leading battery experts.