Replacement battery for Fanvil W610W. Specifications: 1200mAh, 3.8V, Li-Polymer. Compatible with: Fanvil W610W, Fanvil W611W, W610W Portable Wi-Fi IP Phones, W611W Portable Wi-Fi IP Phones. Replaces: Linkvil BA30, Linkvil YJ563170. Linkvil replacement battery designed for Cordless Phone devices. Built to deliver the same performance as the original.