FPCBP448 Fujitsu Stylistic Q737 Replacement Battery 10.8V 4200mAh
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FPCBP448 Fujitsu Stylistic Q737 Replacement Battery 10.8V 4200mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
FPCBP448 Fujitsu Stylistic Q737 Replacement Battery 10.8V 4200mAh - is backordered and will ship as soon as it is back in stock.
Voltage
10.8V
Amp
4200mAh
Fujitsu Stylistic Q737 Series — 10.8V Li-Polymer Replacement Battery (FPCBP448)
This 10.8V 4200mAh Li-Polymer battery replaces OEM part FPCBP448 (also CP675904-01 and FPB0322S) in the Fujitsu Stylistic Q737, Q736, and Q775 hybrid tablet-notebook. It slots into the detachable notebook base and restores full system power to the computing chassis. Capacity matches the factory spec at 45.36Wh.
- Stylistic Q736 / Q737 / Q775 compatibility: All three models share the same notebook base form factor, connector pinout, and BMS handshake protocol. The battery management circuit communicates over the same SMBus rail, so a single cell design covers the full trio without firmware conflicts.
- Bench tested on actual hardware: We ran this cell through charge, full-load discharge, and BMS communication checks on the Stylistic platform. The BMS negotiated correctly, charge termination triggered at the expected cutoff voltage, and no protection trips occurred during sustained CPU and display load.
- Post-install calibration on the Stylistic Q737: After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. The Stylistic's BIOS battery-learn cycle resets against the new cell data on that first complete pass — skipping it leaves the fuel gauge reading from stale EEPROM data written by the original cell.
BIOS reporting poor battery health immediately after fitting a new cell
The Stylistic Q737 BIOS reads battery health from EEPROM data embedded in the battery controller — not from live cell measurements. When you swap the physical cell, the EEPROM registers a new device and flags the health status as unknown or degraded until a learn cycle completes. This is not a fault with the replacement cell. Run a full discharge to hibernate, then charge straight to 100% without interruption. After that single cycle the BIOS recalibrates and the health warning clears.
Stylistic Q737 shutting down abruptly at 20–30% charge shown
This happens when the cell voltage drops below the BMS protection threshold under combined CPU and display load, even though the fuel gauge still shows charge remaining. The gauge is reading a capacity curve calibrated to a degraded old cell — the actual voltage cliff arrives earlier than the software predicts. On a fresh replacement cell the curve shifts, but the gauge IC needs two or three full cycles to re-map it accurately. Force a full discharge to hibernate-cutoff, recharge to 100%, and repeat once more — by the second cycle the shutdown point tracks the displayed percentage correctly.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Fujitsu
- 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
The Stylistic Q737 BIOS shows the new battery as 0% or "unknown" right after install — is the cell dead?
The cell is not dead. The BIOS is reading EEPROM metadata from the old battery's controller chip, which is now gone. Until a learn cycle runs, it has no calibrated reference for the new cell and reports zero or unknown. Discharge fully to hibernate-cutoff, then charge uninterrupted to 100% — after that single complete cycle the BIOS registers the new cell correctly.
Windows is showing the wrong Wh rating for this battery in the power report — it says something different from 45.36Wh.
The Wh figure Windows reports comes from the EEPROM design-capacity register on the battery controller, not from a live measurement. The old cell's register value can differ from the actual chemistry of the replacement. Run the battery learn cycle — one full discharge to hibernate, one full uninterrupted charge to 100% — and Windows will update the reported value against the new cell's actual charge throughput. After calibration the figure should align with 45.36Wh.
The Stylistic Q737 fuel gauge jumps around wildly in the first few days with the new battery — it reads 60%, then 80%, then drops to 40% without heavy use.
The fuel gauge IC recalculates state-of-charge by comparing real-time voltage and current draw against a stored discharge curve. That curve was built from the degraded old cell, so readings from the new cell are erratic until the IC maps a fresh curve. It needs two to three complete discharge-recharge cycles to settle. Run the Q737 down to hibernate-cutoff and back to 100% on two consecutive charges — after the third cycle the gauge tracks the new cell accurately.
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