JBL Battery 400

The JBL Battery 400 is a 7.2V, 9444mAh (\(68Wh\)) Lithium-ion replacement battery designed for the JBL PartyBox Stage 320 and Xtreme 4, providing up to 18 hours of playtime. It supports fast charging (10 min = 2 hours play) and weighs 350g, allowing for hot-swapping in compatible speakers.Key Specifications:Model Name: FG4CELL21700GBattery Type: Lithium-ionCapacity: 7.2V / 9444mAh, \(68Wh\)Playtime: Up to 18 hours (varies by volume/content)Compatibility: JBL PartyBox Stage 320, JBL Xtreme 4Fast Charge: 10-minute charge for 2 extra hours of playtimeDimensions: 93 x 25.1 x 89.5 mm (3.66” x 1.0” x 3.5”)Net Weight: 350g / 0.77 lbsOperating Temp: 0–45 °CCharging Case Version (Optional):A JBL Battery 400 with Charging Case is also available, featuring USB-C input/output (5V-20V) to charge the battery externally in roughly 3 hours.