Replacement battery fits 5 Belkin compatible models. Specifications: 1050mAh, 3.7V, Li-ion. Compatible with: Wifi Skype Phone, F1PP000GN-SK, WSKP100, Wifi Phone, SMC Skype Wifi Phone. Replaces: Belkin W0001. Belkin replacement battery designed for VoIP Phone devices. Built to OEM specifications for reliable performance.