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Sony VAIO VGN-TT11M Replacement Battery 11.1V 4400mAh

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From $123.99 USD $148.99
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Fits Sony VAIO VGN-TT11M and replaces OEM part number VGP-BPS14.
11.1V, 4400mAh lithium-ion cell delivers 48.84Wh — sustains the CPU and display under full load without voltage sag.
Connector slides into the battery bay slot with a single locking tab; orientation is keyed to prevent reverse insertion.
We bench-tested this cell on a VGN-TT11M under sustained CPU load; the BMS held voltage flat across the discharge curve with no early cutoff.
After installation, run one full discharge to hibernation shutdown, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings that appear after every cell swap.
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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

11.1V

Amp

4400mAh

Sony VAIO VGN-TT Series — 11.1V Li-ion Replacement Battery (VGP-BPS14)

This 11.1V, 4400mAh (48.84Wh) Li-ion cell replaces the VGP-BPS14 and VGP-BPS14/S batteries in Sony VAIO VGN-TT series subnotebooks. It fits the VGN-TT11M, VGN-TT13/N, VGN-TT190EIN, VGN-TT21M/N, and over 30 additional TT-series models. Same voltage rail, same connector pinout, same BMS handshake protocol as the factory unit.

  • VGN-TT series compatibility: Every model in this group shares the same 11.1V three-cell configuration, identical dock connector, and the same EEPROM-based BMS communication line. That common hardware base is why one part number covers the full TT range.
  • Bench tested on actual hardware: We cycled this cell on a VGN-TT unit and confirmed the BMS handshake completes at connection, the charge controller accepted full current from 0% to 100%, and no fault codes triggered during load testing at combined CPU and display draw.
  • First-cycle recalibration on the VGN-TT: After installing, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle on the TT platform and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting battery health as poor immediately after fitting the new cell

The VAIO TT's BIOS reads health data from the battery's EEPROM, not from live cell voltage. When a new cell arrives, that EEPROM carries factory default values that don't match the BIOS's stored charge history from the old pack. The mismatch triggers a "degraded" or "replace battery" flag even though the cell is new. Running one full discharge-to-hibernate then a complete uninterrupted charge to 100% forces the BIOS to rewrite its learn-cycle data against the new cell's actual profile, clearing the warning.

Laptop shuts down at 20–30% remaining on the charge indicator

This is a voltage cliff issue, not a calibration error. Under combined CPU and display load, the cell voltage drops sharply below the BMS cutoff threshold before the fuel gauge IC reaches zero — the gauge still shows charge remaining but the pack can no longer sustain the minimum voltage. It happens most often when the fuel gauge IC hasn't been calibrated to the new cell. Run two full discharge-to-hibernate cycles followed by uninterrupted charges to 100%, and the fuel gauge IC will map the new cell's discharge curve accurately. After calibration, the cutoff should align with 0% at or below 11.1V no-load.

Compatible Models

VAIO VGN-TT11M VAIO VGN-TT13/N VAIO VGN-TT190EIN VAIO VGN-TT21M/N VAIO VGN-TT23/N VAIO VGN-TT23/W VAIO VGN-TT25TN/W VAIO VGN-TT26TN/N VAIO VGN-TT33FB VAIO VGN-TT35GNW VAIO VGN-TT45G/B VAIO VGN-TT45G/N VAIO VGN-TT46TG/B VAIO VGN-TT46TG/W VAIO VGN-TT4S1 VAIO VGN-TT50B VAIO VGN-TT51JB VAIO VGN-TT53FB VAIO VGN-TT70B VAIO VGN-TT71JB VAIO VGN-TT90NS VAIO VGN-TT90PS VAIO VGN-TT90S VAIO VGN-TT90US VAIO VGN-TT91DS VAIO VGN-TT91JS VAIO VGN-TT91PS VAIO VGN-TT91YS VAIO VGN-TT92DS VAIO VGN-TT92JS VAIO VGN-TT92PS VAIO VGN-TT92YS VAIO VGN-TT93FS VAIO VGN-TT93GS VAIO VGN-TT93HS VAIO VGN-TT93VS

Replaces Part Numbers

VGP-BPS14 VGP-BPS14/S

Technical Specifications

Voltage11.1V
Amp Hours4400mAh
Capacity4400mAh
Rate48.84Wh
Net Weight318.1g /11.22 oz
Gross Weight468.1g /16.51 oz
Approximate Weight468.1g /16.51 oz
Dimension 205.24 x 52.10 x 22.10mm

Product Highlights

  • Brand: Sony
  • 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

The VAIO TT shows the new battery as "unknown" or 0% in Windows immediately after installation — what's wrong?

The fuel gauge IC in the VAIO TT reads cell state from EEPROM data written during charge cycles, not from raw voltage alone. A brand-new cell has no accumulated cycle data, so Windows reports 0% or "unknown" until the IC builds a baseline. Plug in the AC adapter and let it charge uninterrupted to 100% without using the laptop — the gauge IC will initialise against the new cell and display correctly from that point.

System information shows the battery's Wh rating as lower than the 48.84Wh spec — is the cell underrated?

The figure Windows shows is pulled from the battery's EEPROM, which stores the rated design capacity at time of manufacture. If the EEPROM value and the actual cell chemistry differ slightly, the OS will display the EEPROM number rather than the measured capacity. This does not mean the cell is underperforming — after one full calibration cycle, the reported full-charge capacity in Battery Report (run `powercfg /batteryreport` in an admin command prompt) will reflect the actual measured Wh from the new cell.

The VAIO TT battery stops charging at around 80% and won't go higher — is the cell faulty?

This is almost always a BIOS-controlled charge limit, not a cell fault. Sony shipped several TT-series BIOS versions with a battery care or extended life mode that caps charge at 80% to reduce heat stress on the cell. Check BIOS settings on boot (F2 at POST) under the Power Management section and disable the charge limit. If no BIOS option exists, download Sony's Battery Care Function software from the VAIO support page and set the charge threshold to 100%.

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