Although phone batteries can be charged and discharged many times, they will still gradually wear out. If a battery is constantly being overcharged, it might reduce its capacity and lifetime. Keeping a phone connected to a charger (when the phone is already 100% charged) while you are using it may lower battery life if you do it repeatedly.
When enabled, the Protect battery feature limits your phone's battery from being charged above 85% to preserve your battery lifespan in the long run.
Step 1. Go to Settings > Battery.
Step 2. Turn on the switch for Protect battery.
