The JBL PartyBox Stage 320 and Xtreme 4 both utilize the JBL BATTERY400. This is a 68Wh, 7.2V/9444mAh lithium-ion battery. It offers up to 18 hours of music playtime (varies by volume and content) and can be quickly charged with a 10-minute fast charge providing 2 extra hours of playtime.
Key Specifications:
Battery Model: BATTERY400 (also known as FG4CELL21700G)
Battery Type: Lithium-ion
Capacity: 7.2V / 9444mAh, 68Wh
Playtime: Up to 18 hours (varies by volume and content)
Charge Time: 3 hours (speaker off)
Fast Charging: 10 minutes for 2 hours of playtime
USB Output: 5V / 2.1A (Max) (speaker off)
Compatibility: JBL PartyBox Stage 320 and Xtreme 4
