Battery Health: Capacity Check

Battery condition moves used-phone prices more than anything else, yet there's no easy way to check it.
Plug in a charger and a twenty percent rise is enough to estimate real capacity.

■ Measures while you charge
You don't need to keep the app open. It works from charge-counter changes.

■ Health against design capacity
Shows what percentage remains compared with the manufacturer spec.

■ Status card for resale
Creates an image with the model and health, ready to attach to a listing.

■ Current status at a glance
Level, voltage, temperature and charge counter together.

■ Privacy
Battery data is used only for display and estimation and is never transmitted.

■ Please note
Results are estimated from charge-counter changes during charging and are not an official manufacturer diagnosis. Some devices don't report charge data and can't be measured.