Replacement battery for Biackphone BP1. Specifications: 2000mAh, 3.7V, Li-ion. Compatible with: Biackphone BP1, 4GAME, Wiko WAX, Wiko Rainbow 4G. Replaces: Wiko WAX, Wiko L5503AE. Explay replacement battery designed for Mobile/SmartPhone devices. Simple plug-and-play replacement requiring no modification.