Key Features: Brand New Replacement Battery High-quality, fresh cells for long-lasting performance. Exact Compatibility Designed for Panasonic Toughbook FZ-55 MK1 (Battery Model: FZ-VZSU1HU). High Capacity 10.8V, 68Wh, 6300mAh for extended usage. Random Color (Black/White) Ships based on current stock (color cannot be chosen). Safety Certified Built-in protection against overcharge, overheating, and short circuits.