The Panasonic CF-VZSU0XU spare battery is designed specifically for the keyboard section of compatible devices. This high-quality battery features four cells, ensuring reliable power and extended usage time. Ideal for users who require a dependable power source for their Panasonic devices, this battery guarantees optimal performance and longevity. Lightweight and easy to install, the CF-VZSU0XU is the perfect solution for maintaining productivity on the go. Trust Panasonic's reputation for excellence and keep your device powered with this essential accessory.