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Fujitsu LifeBook S6410 Replacement Battery 10.8V 4400mAh

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From $119.99 USD $143.99
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Fits Fujitsu LifeBook S6410, S6410C, S6421, S6510 models; replaces FPCBP177, FPCBP179, FPCBP179AP battery packs.
10.8V 4400mAh lithium-ion cell delivers 47.52Wh for standard notebook runtime on single charge.
Connector slides into battery bay with positive terminal forward; locking tab seats flush against chassis frame.
Bench testing shows BMS accepts charge cycle immediately; fuel gauge IC calibrates within two full discharge-to-charge cycles.
After installation, run one complete discharge to hibernation cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate 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.

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🔹 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

10.8V

Amp

4400mAh

Fujitsu LifeBook S6410 Series — 10.8V Li-ion Replacement Battery (FPCBP177)

This 10.8V 4400mAh Li-ion battery replaces the original FPCBP177 cell in the Fujitsu LifeBook S6410 and S6410C. It also fits the LifeBook S6421 and S6510 where OEM part numbers FPCBP179 and FPCBP179AP apply. Capacity is 47.52Wh at full charge.

  • LifeBook S6410 / S6421 / S6510 compatibility: These models share the same 10.8V bus, identical connector pinout, and a common BMS handshake protocol. One cell covers the full range without modification.
  • Bench tested on actual hardware: We cycled this cell on the S6410 platform and confirmed the BMS accepts the new cell without fault codes. Charge acceptance ran to 100% and the protection circuit tripped correctly at low-cell voltage during deep discharge testing.
  • Post-install calibration on the S6410: After fitting, run the notebook down until it hibernates on its own, then charge uninterrupted to 100% without using the machine. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting battery health as poor after fitting the new cell

The LifeBook BIOS stores capacity and cycle data in EEPROM on the battery pack itself. When you swap the cell, the BIOS reads stale data from the old charge history and flags the new pack as degraded. This is not a fault with the replacement cell. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% and the BIOS learn cycle will rewrite its baseline. After two or three full cycles the health indicator normalises.

S6410 shuts down at 20–30% remaining instead of hibernating at low battery

This symptom points to a voltage cliff in the cell, not the fuel gauge. Under combined CPU and display load the pack voltage drops sharply before the fuel gauge IC registers the correct state of charge. The BIOS hits the hardware undervoltage threshold and forces an immediate shutdown rather than a clean hibernate. To confirm, watch the reported voltage in a battery monitoring tool — if it drops below 10.0V under load while the percentage still reads above 20%, the calibration cycle above is needed. Run the full discharge-to-hibernate procedure and charge back to 100% without interruption to re-anchor the fuel gauge IC against actual cell voltage.

Compatible Models

LifeBook S6410 LifeBook S6410C LifeBook S6421 LifeBook S6510 LifeBook S7210 LifeBook S7211 LifeBook S7220LA

Replaces Part Numbers

FPCBP177 FPCBP179 FPCBP179AP

Technical Specifications

Voltage10.8V
Amp Hours4400mAh
Capacity4400mAh
Rate47.52Wh
Net Weight292g /10.30 oz
Gross Weight562g /19.82 oz
Approximate Weight562g /19.82 oz
Dimension 269.70 x 51.00 x 20.70mm

Product Highlights

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

Frequently Asked Questions

The LifeBook S6410 shows the battery as "unknown" or 0% immediately after fitting the new cell — what causes this?

The fuel gauge IC on the S6410 platform loses its reference point when the old cell is removed. It has no baseline for the new cell's voltage curve, so it reports 0% or unknown until it can anchor itself. Run the machine off mains until it hibernates on its own, then charge uninterrupted to 100% — this gives the fuel gauge IC one complete cycle to calibrate. The reading stabilises within two to three full cycles.

System information shows a lower Wh rating than 47.52Wh after installing this battery — is the cell underspec?

No. The Wh figure shown in Windows or the Fujitsu battery utility is pulled from the EEPROM data embedded in the pack, which may reflect a rated value from the original cell's chemistry profile rather than the actual new cell. The physical cell is 47.52Wh. After one full calibration cycle — discharge to hibernate, charge to 100% — the system recalculates design capacity against measured charge acceptance and the reported figure updates to match the actual cell.

The S6410 fuel gauge reads full but drops to 10% within minutes of unplugging — what is happening?

This is shallow-cycle degradation in the old cell triggering a corrupted fuel gauge baseline, but it can also appear with a new cell if the BIOS learn cycle was never reset after the swap. The fuel gauge IC is using a capacity map that no longer matches the physical cell, so it compresses the entire discharge curve into a narrow band near the top. Disconnect the mains, let the laptop run down to a full hibernate shutdown, then charge back to 100% without interruption. Check the voltage reading in a battery utility — it should hold above 10.5V at the point the gauge reads 50%.

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