When using your first generation Ember Travel Mug, you can expect a battery life of about 2 hours when in use without the charging coaster at a target temperature of about 130°F (54.4°C). Battery life will vary depending on pour temperature, ambient temperature, desired temperature, and if cold creamer was added.
For best results, we recommend pouring in liquid that is hotter than your set temperature. Please also ensure any additions are fully stirred in.