Know what wears a battery out
What actually shortens a phone battery’s life, and what leaves it alone.
Every phone battery holds a little less each year. Heat, and long spells at completely full or completely empty, wear it fastest.
Phones report this as battery health: the share of the capacity it had when new.
Key points
- A battery holds less each year, and heat speeds that up
- Battery health is the share of the capacity it had when new
What to remember
- One number says whether the battery is tired.
- A short day is usually age, not a fault.
Try this
Find Battery in your own Settings and write the health figure down. Compare it next year.
Practice: Know what wears a battery out. Your first lesson is free, with no account or card; the rest are part of a Lantern plan. Interactive lessons require JavaScript.