Why Do Phones Still Use Battery When Powered Off?

Phones can still lose charge while powered off because tiny standby circuits keep running and lithium-ion batteries naturally self-discharge.

That means a fully shut-down phone is not truly at zero drain, especially over days or weeks of storage.

For long-term storage, keep the battery around 50% charged and top it up periodically to avoid deep discharge.

Store unused phones in a cool, dry place to help protect battery health and reduce long-term damage.