Replacement battery for 850. Specifications: 4400mAh, 7.4V, Li-ion. Compatible with: 850, BRV-HD, Klipsch KMC1. Replaces: Braven J177/ICR18650-22PM, Braven AE18650CM1-22-2P2S. Braven replacement battery designed for Wireless Speaker devices. Built to OEM specifications for reliable performance.