How long does the battery last?

Ember rates about 80 minutes off the saucer at a middling temperature. Expect less in a cold room or at the highest setting, and all-day use if you keep it on the charging saucer.

Can I put it in the dishwasher?

No. The electronics and battery mean the mug is hand wash only. Rinse and wash by hand, and keep the charging contacts dry.

What temperature range does it hold?

You can set it from 120°F to 145°F in the Ember app. The mug shows the current temperature on its LED and holds your preset until the drink is gone or the battery runs out.

Does it work without the app?

Yes, it keeps its last set temperature without a phone nearby. The app is needed to change temperatures, save presets, and install firmware updates.

What comes in the box?

The mug, a charging saucer, and a power adapter. It does not include a lid.

Is the Ember Mug 2 worth it over a regular insulated mug?

It is the only one of the two that actively heats. A vacuum mug slows cooling for an hour or two; the Ember holds an exact set temperature and can run all day on its saucer. If you finish coffee quickly, a plain insulated mug does the job for far less.