Smartphone battery health: limit charging to 80% and avoid deep discharge

Google, Samsung, Xiaomi and other Android manufacturers include a hidden setting that caps charging at about 80 % and completes the final top‑up minutes before the user wakes. Activating this "smart charging" or "battery protection" option reduces chemical stress on lithium‑ion cells, extending battery lifespan.

Experts advise that repeatedly letting a phone’s battery fall to 0 % or keeping it at 100 % accelerates wear. They recommend charging between roughly 20 % and 80 % when possible, avoiding extreme temperatures, using quality chargers and keeping the device’s software up to date. These practices together help preserve capacity and delay the need for a replacement.