What type of battery does the YEVO 1 use? The YEVO 1 headphones are fitted with a 55mAh Li-Ion battery. The Charge case is fitted with a 600mAh Li-Ion battery. Related articles How long is the warranty valid? My YEVO stopped working, what do I do? The YEVO 1 App How do I get my YEVO 1 repaired? What does the warranty cover?