The practice of restricting the maximum state of charge to which a mobile device’s battery is charged. For example, instead of allowing the battery to reach 100%, the device halts charging at 80% or 90%.
This approach aims to extend the battery’s lifespan. Lithium-ion batteries degrade faster when consistently charged to full capacity and kept at that level for extended periods. Limiting the upper end of the charge cycle reduces stress on the battery’s internal chemistry, potentially increasing the number of charge cycles it can endure before significant degradation occurs. Historically, manufacturers have implemented this feature to address consumer concerns about battery longevity and sustainability.