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Sony Tablet S SGPBP04 Replacement Battery 3.7V 6000mAh

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From $52.99 USD $65.99
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Fits Sony Tablet S model SGPT121US/S and GPT121 — replaces OEM part SGPBP04.
3.7V, 6000mAh lithium-polymer cell restores full charge cycles on this 9.4-inch Android tablet.
Connector slides straight into the battery slot with a single locking tab — no force needed.
We bench-tested this cell in the Tablet S — BMS accepted charge, voltage curve stable throughout.
After installation, run one full discharge to automatic shutoff then charge uninterrupted to 100% — this resets the fuel gauge IC calibration against the new cell and resolves the inaccurate percentage display that appears after a 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

3.7V

Amp

6000mAh

Sony Tablet S (SGPBP04) — 3.7V Li-Polymer Replacement Battery

This is a 3.7V, 6000mAh lithium-polymer battery for the Sony Tablet S. It fits the GPT121 and SGPT121US/S hardware platforms alongside the Tablet S. Capacity figures come from the product data — 6000mAh, 22.2Wh.

  • Tablet S platform fit: The GPT121 and SGPT121US/S variants share the same battery bay dimensions, connector pin-out, and charge-management circuit as the base Tablet S. One battery cell covers the full platform without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the Tablet S platform. The onboard battery management system accepted the new cell, completed a full charge cycle without fault flags, and the charge IC reported correct voltage at rest.
  • Fuel gauge reset after installation: After fitting the new cell, run the tablet down to automatic shutoff, then charge it uninterrupted to 100% without using the device. This single full cycle resets the fuel gauge IC calibration against the new cell and clears the inaccurate percentage readings that commonly appear after a swap.

Sony Tablet S shutting down between 15% and 25% remaining

This is a voltage-cliff failure. Under combined load — backlight at full, WiFi active, background sync running — the cell voltage drops faster than the fuel gauge expects. The system hits the low-voltage cutoff threshold before the displayed percentage reaches zero. The fuel gauge IC is still calibrated to the old, degraded cell curve. One full discharge-to-shutoff followed by an uninterrupted charge to 100% remaps the gauge to the new cell. After that cycle, the percentage display tracks the actual cell state accurately.

Battery percentage jumping or reading incorrectly after the swap

The fuel gauge IC stores a charge profile from the previous cell. When a new cell is installed, the stored profile no longer matches the actual voltage curve, so the displayed percentage drifts or jumps. This is a calibration mismatch — not a fault in the new cell. Discharge the tablet fully until it powers off on its own, then charge it to 100% without interruption. The IC re-learns the new cell's voltage curve and the percentage stabilises at that point.

Compatible Models

Tablet S GPT121 SGPT121US/S

Replaces Part Numbers

SGPBP04

Technical Specifications

Voltage3.7V
Amp Hours6000mAh
Capacity6000mAh
Rate22.2Wh
Net Weight122g /4.30 oz
Gross Weight262g /9.24 oz
Approximate Weight262g /9.24 oz
Dimension 226.71 x 87.72 x 3.37mm

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 Tablet S still shuts off around 20% even after putting in the new battery — why won't it run down to zero?

The fuel gauge IC is still using the charge profile it built from the old cell. The new cell's voltage curve doesn't match, so the system triggers a low-voltage shutdown earlier than the displayed percentage suggests. Run the tablet on full brightness with WiFi active until it powers off on its own, then charge it to 100% without interruption. That one complete cycle recalibrates the gauge to the new cell and the early shutoff stops.

The battery percentage on my Tablet S is jumping around and dropping faster than it should from a full charge — is the new battery faulty?

It's not a faulty cell. The fuel gauge IC retained the degradation profile of the original battery, and the new cell's higher capacity doesn't match that stored curve. Percentage drift and rapid apparent drops from 100% are both symptoms of this mismatch. Do one full discharge to automatic shutoff followed by an uninterrupted charge to 100% — the IC resets its reference points against the new cell and the reading stabilises.

The tablet feels warm near the charging port while the new battery charges — is that normal?

Yes. The charge IC on the Tablet S runs a constant-current phase at the start of every charge cycle, and a new cell at lower state of charge draws more current initially than a partially degraded old cell did. That generates more heat through the charge circuit than you may have noticed before. The warmth should reduce noticeably once the cell passes roughly 80% charge and the IC steps down to constant-voltage phase. If the tablet stays hot above 80%, check that the charging cable is rated for the tablet's input current — under-rated cables force the charge IC to work harder.

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