Replacement battery fits 6 Clear compatible models. Specifications: 2100mAh, 3.7V, Li-ion. Compatible with: NetZero 4G Hotspot, NetZero 4G Personal Hotspot, NetZero WIFMM-122, Hotspot Spot 4G, Apollo 4G, Hotspot 4G Apollo. Replaces: Clear GT-2200, Clear 110-200-0018R. Clear replacement battery designed for Wireless Router devices. Simple plug-and-play replacement requiring no modification.