Since the 1.60.39 firmware update, the Charge 3 displays a full screen image of a battery with an exclamation point when the battery is low. Once the user places the tracker on the charger, the charging display indicates there is about 18% capacity, which is usually enough to last more than a day.
1. This warning is surprising and alarming to the user, as it appears full-screen without any accompanying context. Its appearance gives the user the impression that the battery is CRITICALLY low, when it is not.
2. If this screen displayed the actual battery capacity percentage, as on the charging screen, users would be more likely to realize that the battery situation is not dire.
3. If the warning can be dismissed by means other than charging, it is not obvious. Since there are only a few means of user input available on the C3 it may seem that pressing the button to dismiss the warning would be discoverable or obvious. Speaking from experience, the anxiety over believing I needed to recharge RIGHT NOW (see above) can delay such discovery because the user is more worried about finding a charging cable than interacting with the device.
I can appreciate that icons are more universal than text, which requires additional localization efforts, but please consider adding textual guidance to the user in addition to the battery icon and percentage. Something like:
Low battery: 18%
Please recharge today.
Press side button to dismiss.
Alternative suggestion which doesn't require localization -- battery icon with percentage, with a X-in-circle button similar to dismissing a phone call:
c[ 18% ]
( X )
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