Ultralast Rechargeable Replacement Battery for VXI Blue Parrott 052030, 502030 fits BlueParrott B250-XT Wireless Bluetooth Headset, Roadwarrior, Blue-Parrot PL602030 Ultralast Rechargeable Battery Battery Voltage: 3.7V; Capacity: 250mAh ; Li-Pol 100% compatible with Original Battery Lengtht 1.2";Width 0.8";Height0.21"