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Battery Benefits: UL2054 Certified and UN38.3 Compliant, safe for air transport. Over 1000 recharge cycles. All items are certified by CE, FCC, and RoHS for safety. Features an improved circuit board with multi-command chip control for stable charging and discharging. Contains over-charge and over-discharge protection for rapid charging and low energy use. Compatible Laptop Models: For Panasonic TOUGHBOOK, including Toughbook 54, 54 Gloved Multi Touch, 54 Lite, 54 Performance, 54 Prime Series, and specific models: CF-54F9001KM, CF-54G2999VM, CF-54F0961NE, 54F0961VM, 54A0005CM, 54D2912VM, 54D0005KM. Specification: Battery Model: CF 54 Battery/CF-VZSUOPW. Capacity: 4200mAh/46Wh. Voltage: 11.1V. Battery Type: Li-Polymer. 100% brand new from manufacturer. Compatible Part Numbers: CF-VZSUOPW, CF-VZSU0PR, CF-VZSU0GJS, CF-VZSU0PJS, CF-VZSUOGW, CF-VZSU0LW, CF-VZSU0KJS, CF-VZSU0KW, CF-VZSU0PK, CF-VZSU0KR. Safety Certifications and Quality Control: Multiple safety certifications including CE, FCC, RoHS, and UL provide reliable performance and protection from overcharging and over-discharging