Amazon.com: PANASONIC TOUGHBOOK 55 FZ-55 FZ-VZSU1HU Standard Battery for FZ-55 Mk1. Can be Used as a Replacement for The Main Battery or as an Optional Second Battery in The Front : Electronics
Genuine Cf-vzsu0kw Battery Cf-vzsuokw For Panasonic Laptop Cf-54 2nd Bay Cf-54mk1 Media Bay 2nd 11.1v 2960mah 32wh - Laptop Batteries - AliExpress
Genuine OEM Panasonic Toughbook CF-54 Secondary Battery - NEW