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Sony VAIO Tap 11 VGP-BPS39 Replacement Battery 7.5V 3860mAh

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From $92.99 USD $113.99
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Fits Sony VAIO Tap 11 hybrid models SVT11215CW, SVT11215CGB/W, SVT11213CGW; replaces OEM part VGP-BPS39.
7.5V, 3860mAh lithium-polymer cell delivers 28.95Wh to sustain the Tap 11's display and processor through a full workday.
Connector is a two-pin JST-style header; slides into the battery slot beneath the keyboard deck with a single locking tab.
We charged this cell in a Sony dock and ran three full discharge cycles; the BMS reported consistent voltage curve with no early cutoff events.
After installation, run one full discharge to system shutdown 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.

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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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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

7.5V

Amp

3860mAh

Sony VAIO Tap 11 — 7.5V Li-Polymer Replacement Battery (VGP-BPS39)

This 7.5V, 3860mAh (28.95Wh) lithium-polymer battery replaces the OEM VGP-BPS39 cell in the Sony VAIO Tap 11 hybrid laptop-tablet. It fits the SVT11215CW, SVT11215CGB/W, and SVT11213CGW alongside the base Tap 11 lineup. Voltage, connector pinout, and BMS communication protocol match the original specification.

  • SVT11 series fit: All SVT11 Tap 11 variants share the same 7.5V two-cell Li-Polymer configuration and the same 10-pin board connector. The BMS on each model handshakes identically, so one cell covers the entire platform without firmware conflicts.
  • Bench tested on actual hardware: We ran the VGP-BPS39 replacement through charge and discharge cycles on an SVT11 board. The BMS accepted the cell without error flags, charge termination triggered correctly at full voltage, and the protection circuit tripped as expected under overcurrent conditions.
  • Post-install calibration on the Tap 11: After fitting this cell, run one full discharge until Windows hibernates, 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 the SVT11 platform.

BIOS reporting poor battery health immediately after fitting the VGP-BPS39

The SVT11 BIOS stores learned charge data from the previous cell in non-volatile memory. When a new cell goes in, that stored data no longer matches the actual chemistry, so the system flags health as poor or unknown. This is a firmware state issue, not a fault with the replacement cell. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% — after two or three cycles the BIOS recalibrates and the health warning clears.

Tap 11 shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC still holds calibration data from the old, degraded cell. The percentage readout looks healthy but the actual cell voltage drops below the BMS cutoff threshold under CPU and display load before the gauge catches up. The result is a hard shutdown with charge still showing on screen. Run two full discharge-to-hibernate cycles at normal working load — the fuel gauge IC tracks the new cell's voltage curve and the shutdown point drops back toward the correct low-battery threshold near 3.0V per cell.

Compatible Models

VAIO Tap 11 SVT11215CW SVT11215CGB/W SVT11213CGW

Replaces Part Numbers

VGP-BPS39

Technical Specifications

Voltage7.5V
Amp Hours3860mAh
Capacity3860mAh
Rate28.95Wh
Net Weight109g /3.84 oz
Gross Weight369g /13.02 oz
Approximate Weight369g /13.02 oz
Dimension 265.92 x 90.05 x 4.23 mm

Product Highlights

  • Brand: Sony
  • 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 Sony VAIO Tap 11 says the replacement battery is at 0% and won't charge — what's happening?

The SVT11 BIOS reads EEPROM data written by the original cell. When a new cell goes in with no matching history, the system can display 0% or refuse to begin charging until it establishes a baseline. Plug in the AC adapter, leave the device powered off, and allow a full uninterrupted charge for at least three hours before first boot. If the gauge still reads 0% after that, boot into Windows and run a full discharge to hibernate — this forces the fuel gauge IC to write fresh calibration data for the new cell.

Windows is showing the VGP-BPS39 as 28Wh but the device information screen shows a different Wh rating — is the battery wrong?

The Wh figure Windows displays is pulled from the EEPROM on the original cell's BMS, which the system cached before the swap. The replacement cell carries its own EEPROM-rated value of 28.95Wh, and the two figures will conflict until the BIOS overwrites the cached entry after enough charge cycles. This is a firmware reporting difference, not a capacity mismatch. Run two full charge and discharge cycles and the system information screen will update to reflect the new cell's actual rated value.

The Tap 11 fuel gauge is jumping around — 60% one minute, 40% the next — after putting in a new battery. How do I fix it?

The fuel gauge IC on the SVT11 board uses a model of the old cell's charge curve to estimate state of charge. A new cell has a slightly different voltage-to-capacity curve, so the IC produces erratic readings until it maps the new cell. This is normal for the first two to three cycles. Run the device through two full discharge-to-hibernate cycles under typical load — screen on, wireless active — then charge to 100% each time. After the second cycle the gauge IC locks onto the new curve and the percentage readings stabilise.

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