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Samsung Ultrabook 940X3G Compatible Battery 7.6V 6100mAh

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Fits Samsung Ultrabook 940X3G; replaces OEM part AA-PLVN4CR.
7.6V, 6100mAh lithium-polymer cell delivers 46.36Wh to sustain ultrabook CPU and display load.
Connector seats into the Samsung proprietary slot with single-tab retention on the left edge.
We bench-tested the BMS against the 940X3G charging circuit; cell accepted charge linearly, no early cutoff.
After installation, discharge fully to hibernation cutoff, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears false health warnings.
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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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.

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⚠️ 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

7.6V

Amp

6100mAh

Samsung Ultrabook 940X3G — 7.6V Li-Polymer Replacement Battery (AA-PLVN4CR)

This 7.6V, 6100mAh (46.36Wh) lithium-polymer cell replaces the original AA-PLVN4CR battery in the Samsung Ultrabook 940X3G. It fits the thin-profile chassis of this ultrabook and connects via the original flex ribbon connector. Voltage and capacity match the OEM specification exactly.

  • 940X3G platform fit: The 940X3G uses a sealed ultrabook chassis with a dedicated battery bay and a proprietary flex connector tied to the BMS handshake. This cell carries the correct EEPROM header data so the system firmware recognises it without a hardware fault flag on first boot.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge on the 940X3G platform. The BMS accepted the cell immediately, reported state-of-charge correctly after two calibration cycles, and showed no voltage sag under sustained CPU and display load.
  • First-cycle calibration on the 940X3G: After fitting this cell, run the laptop down to hibernate cutoff on a normal workload — do not force-shutdown. Then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

BIOS reporting poor battery health after fitting the AA-PLVN4CR replacement

Samsung's BIOS reads health data from the EEPROM stored on the battery controller, not from live cell measurements. When a new cell is installed, the EEPROM registers no learned cycles, so the firmware flags it as degraded before any calibration has run. This is a firmware state issue, not a cell fault. One full discharge-to-hibernate followed by an uninterrupted charge to 100% writes fresh learn-cycle data and clears the warning. After two complete cycles the health indicator should read normal.

940X3G shutting down at 20–30% shown on the fuel gauge

The fuel gauge IC in the 940X3G estimates remaining capacity from voltage curves mapped to the original cell. A new cell has a slightly different voltage-to-capacity curve until it has been calibrated. Under full CPU and display load, voltage drops faster than the gauge predicts, and the BMS triggers a hard shutdown before the displayed percentage reaches zero. This is not a faulty cell — it is a calibration gap. Run two full discharge-to-hibernate and charge-to-100% cycles to remap the curve. After calibration the shutdown threshold should align with 5% or below.

Compatible Models

Ultrabook 940X3G

Replaces Part Numbers

AA-PLVN4CR 1588-3366 BA43-00366A

Technical Specifications

Voltage7.6V
Amp Hours6100mAh
Capacity6100mAh
Rate46.36Wh
Net Weight233.6g /8.24 oz
Gross Weight493.6g /17.41 oz
Approximate Weight493.6g /17.41 oz
Dimension 301.68 x 104.34 x 4.20mm

Product Highlights

  • Brand: Samsung
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My 940X3G shows the replacement battery as 0% and won't charge — is the EEPROM the issue?

Yes. The EEPROM on the new cell has no learned cycle data, so the fuel gauge IC initialises at zero and the charging circuit can stall waiting for a valid state-of-charge reading. Plug in the AC adapter, leave the laptop connected for 30 minutes without powering it on, then boot directly to the BIOS to confirm voltage is being detected above 3.0V per cell. If voltage reads correctly in BIOS, boot into Windows and let the charge run uninterrupted to 100% — the gauge IC will populate from there.

System info shows this battery as 30Wh but the spec says 46.36Wh — why is the Wh rating wrong?

Windows reads the Wh figure from the EEPROM design capacity field, which on a new cell may report the rated chemistry baseline rather than the actual installed capacity until a learn cycle writes the correct value. This is an EEPROM data state, not a cell capacity fault. Run one full discharge-to-hibernate-cutoff cycle followed by a complete uninterrupted charge to 100%. After that cycle the BIOS rewrites the design capacity field and Windows should report the correct 46.36Wh figure.

Charge stops at 80% on the 940X3G and never climbs higher — is the new cell defective?

Almost certainly not. Samsung's BIOS on the 9-series ultrabook includes a battery longevity charge limit that caps charging at 80% when enabled in Samsung Settings or the BIOS power menu. This is firmware behaviour, not a cell fault. Open Samsung Settings, navigate to the battery section, and confirm the charge limit toggle is set to 100% rather than the extended-life mode. Once switched, the next charge cycle will run to full voltage — 8.70V across the pack.

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