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Rectangular lithium-ion battery pack for Toughbook 55 MK1

Panasonic

Panasonic FZ-VZSU1HU 10.8 V battery for Toughbook 55 MK1

SKU CH-TZST-T4A5X

10.8 V lithium-ion rechargeable battery for the Toughbook 55 MK1 notebook, recharging in up to three hours

  • Battery typeLithium-Ion
  • Product typeConsumer Electronics
  • Powers Toughbook 55 MK1 with 10.8 V lithium-ion cell
  • Recharges fully in up to 3 hours for quick turnaround
  • Genuine Panasonic part FZ-VZSU1HU ensures exact fit
  • Proprietary form factor matches original notebook battery bay
  • Lithium-ion chemistry delivers reliable cycles for daily field use

Genuine Panasonic battery for Toughbook 55 MK1

This 10.8 V lithium-ion pack is built for the Panasonic Toughbook FZ-55 MK1 notebook. It replaces the original cell when runtime has dropped or the pack no longer holds charge. Field workers and mobile professionals get a direct-fit replacement without adapter cables or firmware workarounds.

Proprietary form factor with three-hour recharge

The battery uses a proprietary shape that locks into the Toughbook 55 MK1 chassis, so there is no loose fit or connector mismatch. Lithium-ion chemistry delivers consistent output voltage across the discharge curve. A full recharge completes in roughly three hours from empty, letting users top up during a lunch break or shift change.

Restores factory runtime for aging Toughbook 55

This pack replaces a depleted original battery in the FZ-55 MK1, bringing the notebook back to its rated mobility. The upgrade is worth it when the old cell drains in under an hour or triggers sudden shutdowns under load. Buyers needing hot-swap capability or a second pack for continuous operation should look elsewhere, as this is a single internal unit.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $275.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand namePANASONIC ACCESSORIES
Product typeConsumer Electronics
Power
Battery typeLithium-Ion

Questions about this item

What voltage does the 10.8 V battery deliver to the Toughbook 55 MK1?

It supplies 10.8 V DC, matching the notebook’s input requirement so the system charges and runs at the correct level.

Will this proprietary-size pack fit the FZ-55 MK1 chassis without modification?

Yes, the battery is built to the exact proprietary dimensions for the Toughbook 55 MK1, so it seats directly in the standard bay.

How is the battery installed, and what step do people often miss?

Slide the pack into the bay until the latch clicks; the step users miss is letting it charge for the full 3-hour maximum recharge time before first use.

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