let’s see the new Apple Watch Series 5

Bright screen
The always-on display is useful and power-efficient
Compass is handy for hiking and walking directions
International emergency calling on cellular models
Generally fast performance
No battery life improvements
No third-party watch faces
No new fitness features
To make this always-on screen possible, Apple adopted a new technology: a low-temperature poly-silicon and oxide display, or LTPO for short. What you need to know is that it gets down to refresh rates as low as 1Hz, which is critical, as otherwise, the battery would drain before your workday is up. But it’s not just components like an integrated circuit and ambient light sensor at work here. An Apple spokesperson tells me the company audited 34 watch faces, making modifications on a case-by-case basis to help conserve battery life. In some cases, for example, an on-screen clock that counts the seconds now updates the time merely every minute in always-on mode. In the Workouts app, the timer that normally shows fractions of a second only shows whole seconds when the screen has been auto-dimmed.
In other instances, the dimmed watchface doesn’t necessarily show less information, but it might be darker — again, to conserve power. A white face might become black when your wrist is down. In the case of the Numerals watchface, boldly colored numbers darken so that you only see thin outlines of the numbers when the display is dim. 


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