Daily Mode will last roughly from morning to morning between charges. This mode continued to be utilized for enabling the most features and daily charging.
From a full charge, if your watch is in =Extended Mode, the battery can last up to 2 days and 2 nights. Use Extended Mode to optimize enabling the must-have features and the longest battery life for a “still smart” Wear OS watch.
For Time Only mode, the primary intention is to keep your watch from dying before you reach a charger. In this mode, the battery can last 3+ days. Your watch will switch to this mode when the battery is extremely low and it will still enable you to tell time with your watch.