This video investigates common beliefs about smartphone battery charging, specifically whether fast charging degrades battery health more than slow charging, and if charging within a specific percentage range (30%-80%) is beneficial. The experiment also examines the impact of battery wear on phone performance and suggests when a battery replacement might be necessary.
The experiment automated the charging and draining cycles using custom software called "Discharge Loop." This app would drain the phone's battery until it reached 5%. At that point, it would send a signal to a relay connected to the charger, closing the circuit and initiating charging. Once the phone reached 100%, the app would signal the switch to open, stopping the charge, and then begin draining the battery again, repeating the cycle. For Android phones, an anti-crash device was also used to detect screen color changes and automatically reopen the app if it crashed.
