The battery capacity for this unit is 3280 mAh. It’s similar to what you would get on an iPhone. That being said, the Harman Kardon Onyx Studio 5 is just used for music playback, you’re not keeping it on all the time, and it’s not a power-hungry unit either.
Based on our tests, we noticed that the Harman Kardon Onyx Studio 5 could last for 8 hours of playback at 50% volume. Of course, if you choose to play it back at higher volumes, then the battery life will take a bit of a hit. Nevertheless, it’s not as much as you would expect, so you have to keep that in mind and make the most out of the entire process. The charging time is around 5 hours, so the good idea is to charge it during the night if you want to.