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Battery Benefits: Over 1000+ recharge cycles; Certified by CE, FCC, RoHS, and UL for safety; An enhanced circuit board with multiple command chip control provides stable charge and discharge. Over-charge and discharge protection enables fast charging and low power consumption. Compatible Laptop Models: Specifically designed for the Panasonic Toughbook 55 FZ-55 Mk1. Note: Not compatible with the CF-54 model. Specifications: - Battery Model: FZ55 Battery / FZ-VZSU1HU. - Capacity: 6300mAh / 68Wh. - Voltage: 10.8V. - Battery Type: Li-Polymer. Compatible Part Number: FZ-VZSU1HU. Engineered for the TOUGHBOOK FZ-55, it delivers extended runtime for your PANASONIC TOUGHBOOK FZ-55