I couldn't say exactly since every night I just plug it in when I go to sleep and when I'm listening during the day I plug it in when it turns to yellow and continue listening.
Please I have a question about charging.
If I charge the Mojo to full
with the Mojo off, I have no issues with playing and charging. It will show me a blue light for a good while, and then a white light for a good while, then back to blue and so on. I am pretty sure the battery stays topped up, and no problem.
However if the battery is empty and I listen and charge I get problems. It charges and plays for about five hours, then the charging shuts off and it runs on battery. It continues on battery until it's flat. It will not start charging again until I switch off the charger and switch it on again. Then it does the five or so hours and back to zero battery eventaully again. I have heard this before, and someone complained they couldn't use it as a desktop of hi-fi DAC. They sent theirs back and got a replacement and their new Mojo is fine.