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Microsoft Surface Pro X 1876 Compatible Battery G3HTA056H 7.58V

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Fits Microsoft Surface Pro X 1876 and replaces OEM part number G3HTA056H.
7.58V and 4800mAh capacity restores full charge cycles on this 2-in-1 tablet.
Connector aligns vertically into the battery slot with a single locking tab on the left edge.
We bench tested the G3HTA056H against the 1876 motherboard — the fuel gauge IC accepted the new cell after the first charge cycle without errors.
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 inaccurate percentage display.
Extended delivery time

Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.

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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

7.58V

Amp

4800mAh

Microsoft Surface Pro X 1876 — 7.58V Li-Polymer Replacement Battery (G3HTA056H)

This is a 7.58V, 4800mAh (36.38Wh) Li-Polymer replacement battery for the Microsoft Surface Pro X model 1876. It fits the slim 2-in-1 tablet chassis directly, using OEM part number G3HTA056H. Swap it when the original cell no longer holds a useful charge through a normal work session.

  • Surface Pro X 1876 fitment: The 1876 chassis uses a specific connector orientation and BMS handshake tied to the G3HTA056H part number. Voltage must match the 7.58V nominal rail — the onboard power management IC will reject cells outside that spec and prevent the unit from powering on.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Surface Pro X 1876 unit. The BMS accepted the cell without fault codes, charge current ramped correctly through CC/CV stages, and the display reported percentage within normal variance after a recalibration cycle.
  • Fuel gauge recalibration after install: After fitting this battery, run one full discharge to automatic shutoff — do not force-shutdown — then charge uninterrupted to 100%. The fuel gauge IC is still calibrated against the old cell's curve. That single full cycle resets it against the new cell and clears the inaccurate percentage readings that appear immediately after a swap.

Why the Surface Pro X shuts down at 15–25% after a battery swap

The Surface Pro X combines a high-resolution display and always-on LTE or Wi-Fi into a very thin chassis. Under combined load — screen at full brightness plus active wireless — the new cell draws enough current that voltage sags below the BMS cutoff threshold before the percentage counter reaches zero. The firmware reads a low-voltage trip as an empty cell, not a calibration error. One complete discharge-to-shutoff cycle followed by an uninterrupted charge to 100% aligns the fuel gauge IC to the new cell's actual voltage curve and moves the cutoff point back to below 5%.

Fast charging not available after battery replacement on Surface Pro X

The Surface Pro X uses USB-PD negotiation to determine charge rate — the charge controller needs at least one completed charge cycle on the new cell before it confirms the cell can accept higher current safely. Until that cycle runs, the system defaults to standard charge rate as a protection fallback. Connect the original Microsoft Surface charger, not a third-party USB-C adapter, for the first full charge. After one complete charge to 100%, USB-PD negotiation resets and fast charging becomes available again.

Compatible Models

Surface Pro X 1876

Replaces Part Numbers

G3HTA056H

Technical Specifications

Voltage7.58V
Amp Hours4800mAh
Capacity4800mAh
Rate36.38Wh
Net Weight168.4g /5.94 oz
Gross Weight308.4g /10.88 oz
Approximate Weight308.4g /10.88 oz
Dimension 231.10 x 107.60 x 3.10mm

Product Highlights

  • Brand: Microsoft
  • 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 Surface Pro X is showing 80% battery right after I installed the new cell — is the percentage accurate?

No — the fuel gauge IC is still calibrated against the old cell's discharge curve, so the reading will be off immediately after a swap. Run the tablet down to automatic shutoff without manually powering it off, then charge uninterrupted to 100%. That single full cycle recalibrates the fuel gauge IC against the new cell. After the cycle completes, percentage accuracy returns to normal.

The Surface Pro X battery percentage drops fast from 100% then slows down — what's happening?

This is fuel gauge drift caused by the IC mapping the new cell's voltage curve incorrectly at the top end. The old cell had a shallower voltage drop near full charge; the new cell drops more steeply from 100% to around 85%, then levels out. The fix is the same recalibration cycle — one full discharge to automatic shutoff, then an uninterrupted charge to 100%. After that cycle, the IC locks onto the correct curve and the drop from full charge normalises.

Surface Pro X feels warm near the top edge while charging the new battery — should I stop?

The warmth near the top edge comes from the charge IC on the motherboard running CC/CV charge stages on a new cell — it draws slightly higher current initially than a degraded old cell would. We recorded surface temperatures in the normal range during bench testing and saw no thermal fault flags from the BMS. If the device becomes hot to the touch or the screen dims suddenly, disconnect and check the charger output. Mild warmth through a standard charge cycle on a new cell is expected and resolves once the cell passes the first few cycles.

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Microsoft Surface Pro X 1876 Replacement Battery, 7.58V, 4800mAh, Li-Polymer 1

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