The 80-20 rule is a charging strategy designed to help extend the lifespan of rechargeable batteries used in modern electronic devices. Most smartphones, tablets and other electronic devices use lithium-ion batteries. These batteries offer high energy density and allow devices to have good battery life.
The longevity of these batteries is influenced by several factors, including operating temperature, state of charge, charging intensity and how the device is used. For this reason, experts recommend that those who wish to preserve the battery for longer avoid, whenever possible, charging extremes.
