Sony VAIO VGP-BPL5 Replacement Battery 7.4V 11000mAh
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Sony VAIO VGP-BPL5 Replacement Battery 7.4V 11000mAh - 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.
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Disclaimer
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Sony VAIO VGP-BPL5 Replacement Battery 7.4V 11000mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
11000mAh
Sony VAIO VGN-TX Series — 7.4V Li-ion Replacement Battery (VGP-BPL5)
This is a 7.4V, 11000mAh Li-ion replacement battery for the Sony VAIO VGN-TX56C/W and the broader VAIO VGN-TX ultraportable notebook line. It replaces OEM part numbers VGP-BPL5, VGP-BPL5A, VGP-BPS5, and VGP-BPS5A. The original cells in these machines degrade after a few hundred cycles — this cell restores full capacity in a chassis that Sony no longer supports with new parts.
- VAIO VGN-TX platform fit: The TX series shares a single battery bay geometry, a 7.4V two-cell rail, and the same BMS connector across the VGN-TX16SP/W, VGN-TX2XP/L, VGN-TX37TP, and VGN-TX56C/W. All these models read battery state via the same SMBus protocol, so one cell works across the full TX lineup without a firmware conflict.
- Bench tested on actual hardware: We ran this cell on a VGN-TX unit under a controlled load cycle. The BMS accepted the cell without error, communicated charge state correctly over SMBus, and the cell held voltage above 7.0V through a full discharge sweep to the low-voltage cutoff threshold.
- First-cycle reset for TX notebooks: After fitting this cell, run the laptop on battery until it hibernates at cutoff — do not interrupt — then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to rewrite against the new cell and clears the inaccurate health warning that appears in VAIO Control Center after every cell swap.
BIOS reporting poor battery health immediately after installing a new cell
The VAIO TX BIOS stores battery health data in EEPROM on the old cell. When a new cell goes in, the BIOS reads stale EEPROM figures and flags the battery as degraded before a single charge cycle has run. This is not a fault with the replacement cell. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% — this triggers the learn cycle and overwrites the old EEPROM reference. After two to three full cycles, VAIO Control Center will show accurate health figures.
Laptop shutting down at 20–30% charge shown on the gauge
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The IC is still using the discharge profile from the degraded original cell, so it misjudges the voltage cliff and trips a shutdown early. It is not a BMS fault or a bad cell. Run three full discharge-to-hibernate cycles with uninterrupted charges to 100% between each — the fuel gauge IC recalibrates across those cycles and the shutdown point will move back to near 0%. After calibration, the gauge cutoff aligns with the cell's true low-voltage threshold of approximately 6.0V.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Sony
- 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
Sony VAIO Control Center is showing the new battery as "unknown" or 0% health — did I get a faulty cell?
No — the VAIO BIOS reads health data from EEPROM written by the original cell, not the physical cell sitting in the bay. A fresh cell has no EEPROM history, so the BIOS flags it as unknown or failed before any cycle has run. Run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. That triggers the BIOS battery learn cycle and writes a new EEPROM baseline against the replacement cell.
The system info page is showing the wrong Wh rating — it says something much lower than 81.4Wh. Is the battery mislabelled?
The Wh figure displayed in Windows Device Manager or VAIO Control Center is pulled from the EEPROM on the cell, which stores the rated capacity of the original factory cell — not the physical capacity of the replacement. This is a data read from stored firmware values, not a live measurement of the new cell. The discrepancy will not affect how the cell charges or discharges. After two or three full learn cycles the reported figure will converge closer to the actual 81.4Wh capacity as the fuel gauge IC builds a real discharge profile.
The fuel gauge is jumping around wildly — it shows 60%, then 80%, then drops to 40% within minutes. What's happening?
The fuel gauge IC inside the VAIO TX uses a learned discharge curve from the old cell to estimate remaining charge. With a new cell installed, that curve no longer matches the actual voltage behaviour, so the gauge reads erratically across the first few cycles. This is a calibration gap, not a cell defect. Run three complete discharge-to-hibernate cycles with full uninterrupted charges to 100% in between — by the third cycle, the IC will have mapped the new cell's voltage slope and the gauge will stabilise.
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