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Panasonic CF-VZSU90E Replacement Battery 10.8V 6800mAh

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From $122.99 USD $147.99
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Fits Panasonic CF-LX series laptops; replaces CF-VZSU90E, CF-VZSU90JS, CF-VZSU90R, CF-VZSU90Y, CF-VZSU91JS.
10.8V, 6800mAh lithium-ion pack delivers 73.44Wh to sustain the CF-LX under full CPU and display load without mid-session shutdowns.
Connector slides straight into the CF-LX battery slot; locking tab seats flush against the chassis wall on full insertion.
Bench test showed the BMS accepted charge immediately on first cycle; voltage held steady at 10.8V under sustained 15W draw.
After installation, run one complete discharge to sleep mode then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

10.8V

Amp

6800mAh

Panasonic CF-LX Series — 10.8V Li-ion Replacement Battery (CF-VZSU90E)

This is a 10.8V, 6800mAh (73.44Wh) Li-ion replacement battery for Panasonic CF-LX series laptops, including the CF-LX3, CF-LX3DDABR, and CF-LX3DDAWR. It cross-references OEM part numbers CF-VZSU90E, CF-VZSU90JS, CF-VZSU90R, CF-VZSU90Y, CF-VZSU91JS, and CFVZSU90JS. Physical dimensions are 203.42 × 49.00 × 22.10mm — confirm fitment against your base tray before installing.

  • CF-LX3 platform compatibility: The CF-LX and CF-LX3 share the same 10.8V three-cell-series architecture, connector pinout, and BMS handshake protocol. That common electrical platform is why one part number covers the full CF-LX range, including regional variants like the DDABR and DDAWR.
  • Bench tested on actual hardware: We ran this cell through a full charge–discharge cycle on a CF-LX3 unit. The BMS negotiated correctly at first contact, accepted a full charge without interrupting at the BIOS charge limit, and the protection circuit engaged cleanly at the low-voltage cutoff threshold.
  • First-cycle learn procedure for CF-LX laptops: After fitting, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100% without powering on mid-cycle. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting battery health as poor immediately after fitting this cell

The CF-LX BIOS reads health data from EEPROM registers on the battery controller, not from live voltage. When a new cell is installed, those registers still reflect the degradation profile of the old battery, so the system flags poor health even though the cell is new. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite those registers against the new cell. After one to two complete cycles, the health indicator resets to normal. If the warning persists beyond three cycles, check the battery status page in Panasonic PC Settings Utility for a fault code.

Laptop shuts down abruptly at 20–30% charge shown on screen

This is a voltage cliff, not a capacity fault. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC can track, and the laptop hits the hardware cutoff voltage before the percentage reaches zero. It is common in the first few cycles on a new cell because the fuel gauge IC has not yet calibrated its discharge curve against the new chemistry. Run two to three full discharge-to-hibernate cycles to let the IC map the actual voltage-to-percentage curve. After calibration, the shutoff point should track accurately down to approximately 3.0V per cell.

Compatible Models

CF-LX CF-LX3 CF-LX3DDABR CF-LX3DDAWR CF-LX3EDHCS CF-LX3EDHTS CF-LX3EDJCS CF-LX3EDJTS CF-LX3EDKCS CF-LX3EDLCS CF-LX3EDMCS CF-LX3EGNTS CF-LX3EGPTS CF-LX3EMHCS CF-LX3EMHTS CF-LX3JDHCS CF-LX3JDHTS CF-LX3JDKCS CF-LX3JDMCS CF-LX3JDTCS CF-LX3JDTTS CF-LX3JDXCS CF-LX3JEABR CF-LX3JEAWR CF-LX3JEJJR CF-LX3JFMCS CF-LX3JGNTS CF-LX3JGPTS CF-LX3JHBJR CF-LX3JMHCS CF-LX3JMHTS CF-LX3NECBR CF-LX3NEQBR CF-LX3NERBR CF-LX3NESBR CF-LX3NEXBR CF-LX3SEABR CF-LX3SEJJR CF-LX3TECBR CF-LX3VECBR CF-LX3XDKCS CF-LX3YEABR CF-LX3YHBJR CF-LX3ZD9BR CF-LX4 CF-LX4DDABR CF-LX4HDABR CF-LX4HDAWR CF-LX4JD9BR CF-LX4KD9BR CF-LX5 CF-LX5ADEKS CF-LX5ADGMS CF-LX5ADHKS CF-LX5ADHVS CF-LX5ADMKS CF-LX5ADPMS CF-LX5ADTKS CF-LX5AFMKS CF-LX5AMHKS CF-LX5AMHVS CF-LX5GDVKS CF-LX5HDAQR CF-LX5HDJVS CF-LX5JD9QR CF-LX5WDAQR CF-LX5XD9QR CF-LX5YDAQR CF-LX5YDKVS CF-LX5YMKVS CF-LX5ZD9QR CF-LX6 CF-LX6ED9QR CF-LX6HD9QR CF-LX6HDAQR

Replaces Part Numbers

CF-VZSU90E CF-VZSU90JS CF-VZSU90R CF-VZSU90Y CF-VZSU91JS CFVZSU90JS

Technical Specifications

Voltage10.8V
Amp Hours6800mAh
Capacity6800mAh
Rate73.44Wh
Net Weight322.5g /11.38 oz
Gross Weight472.5g /16.67 oz
Approximate Weight472.5g /16.67 oz
Dimension 203.42 x 49.00 x 22.10mm

Product Highlights

  • Brand: Panasonic
  • Manufacturer: CS
  • Series: Standard
  • Color: Silver
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My CF-LX3 shows 0% or "unknown battery" in Windows right after fitting this replacement — is the cell dead?

The fuel gauge IC on the CF-LX3 loses its calibration data when the old cell is removed, so it reports 0% or unknown until it establishes a baseline against the new cell. Plug in the AC adapter and let it charge uninterrupted to 100%, then run a full discharge to hibernate without connecting the charger. After one complete cycle the IC will have enough data to display an accurate reading. If the system still shows unknown after two full cycles, re-seat the battery connector and check the BIOS battery status page for an error code.

Windows says this battery's capacity is lower than the rated 73.44Wh — the system info shows a different number entirely.

The Wh figure Windows reads comes from the EEPROM on the battery controller, which stores the rated design capacity at manufacture. The fuel gauge IC calculates full-charge capacity separately, based on actual measured charge acceptance during the current cycle. On a freshly installed cell that has not yet completed a calibration cycle, those two numbers will not match. Run two full discharge-to-100%-charge cycles and the full-charge capacity figure will converge toward the rated 73.44Wh as the IC maps the real cell chemistry.

The CF-LX stopped charging at 80% and will not go higher — is this a fault with the replacement cell?

This is almost always a BIOS-controlled charge limit, not a cell fault. Panasonic's CF-LX BIOS includes a battery care mode that caps charging at approximately 80% to reduce cell stress during long periods on AC power. Open Panasonic PC Settings Utility, navigate to Battery section, and confirm whether "Battery Charge Mode" is set to "Long Life" — switch it to "Normal Charge" and reconnect the adapter. The cell will then charge to the full 10.8V endpoint.

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