Why Batteries Swell. Li-ion batteries can swell due to deep discharge of the batteries. Battery swelling happens due to a little thing called outgassing which occurs when a battery gets overcharged damaged or simply oldUnder those circumstances the chemical reaction that keeps your battery running breaks down and just like the name suggests outputs gas.
The main reason that batteries swell is from over charging. DO NOT place heavy objects on the battery or charger. They dont always explode or catch fire.
A swollen battery might seem like a minor problem but it can be quite dangerous.
Lithium-ion Polymer batteries have become popular across the industry in recent years due to their slim and customizable form factor and longer battery useful life. This happens due to the construction of lead acid batteries which is referred to as recombinant. A swollen phone battery can be really annoying as it makes you mobile phone shut down out of nowhere and it can even crack your phoneIn this video you will. Once the battery has reached such a point of failure that the battery is swollen you must assume that all safety mechanisms in the battery are offline.
