GoKawiilEmber Mug 3 review: smart heating works, but battery life falls short
Ember's third-generation smart mug holds 14 ounces, keeps drinks at a set temperature via an app, and charges on an included coaster that doubles as a charging pad rather than a true coaster. In testing, the mug's battery drained within two hours at its highest 145-degree setting when left on the slow-charging coaster, though it performed better on a full charge. The optional lid, despite marketing claims of three extra hours of battery life, simply traps heat rather than adding power.
GoKawiil's interpretation of the reporting above, not reported fact.
The review suggests Ember's design trade-offs—like using a slower two-pin charger instead of Qi wireless charging, likely to limit heat buildup—come at the cost of reliability for a device meant to keep coffee warm all day. This could matter for smart-appliance makers broadly, as balancing power efficiency with real-world convenience remains a persistent challenge in the category. The mismatch between marketing claims and actual battery performance may also raise questions about how such products are advertised.
- The Ember Mug 3 uses a coaster-style charging pad instead of a traditional coaster or Qi charger.
- Battery life dropped fast at high temperature settings, dying within two hours during testing.
- The included lid does not add battery power; it only helps retain heat despite marketing suggesting extended battery life.
Ember Mug 3 — The Ember Mug 3 lets you dial in your ideal coffee temperature and keep it there via the companion app, which is exactly the feature this review digs into. It's a great pick for anyone who hates lukewarm coffee and wants a sleek, dishwasher-safe mug with a charging coaster included.
See Ember Mug 3 on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: engadget.com — Max Miller, 2026-09-29
Published there as: “The Ember Mug 3 is brimming with potential, but it leaves a bitter taste”
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