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Microsoft Surface Pro 6 1807 Compatible Battery DYNM02 7.57V 5900mAh

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Fits Microsoft Surface Pro 6 model 1807 and Surface Pro 5; replaces OEM part DYNM02.
Voltage is 7.57V at 5900mAh capacity, delivering 44.66Wh of charge for full-day tablet operation.
Connector attaches flush to the internal battery slot with mechanical locking tab aligned to device frame.
We bench-tested this cell on the Surface Pro 6 charging circuit; the BMS handshake completed on first insertion with no fault codes.
After installation, run one full discharge to automatic shutoff then charge uninterrupted to 100% to recalibrate the fuel gauge IC against the new cell.
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

7.57V

Amp

5900mAh

Microsoft Surface Pro 6 1807 — 7.57V Li-Polymer Replacement Battery (DYNM02 / G3HTA038H)

This 7.57V, 5900mAh (44.66Wh) lithium-polymer battery replaces the original DYNM02 / G3HTA038H cell in the Microsoft Surface Pro 6 (Model 1807) and Surface Pro 5 (Model 1796). It restores portable operation to the detachable 2-in-1 tablet after the original cell degrades or fails. Voltage, connector pinout, and BMS communication profile match the OEM specification.

  • Surface Pro 5 and Pro 6 compatibility: Both the 1796 and 1807 chassis use the same DYNM02 battery format — identical voltage rail, physical dimensions (228.50 × 120.00 × 4.30mm), and flex connector. The fuel gauge IC communicates over the same SMBus protocol in both generations, so one cell covers both.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Surface Pro 6 unit. The BMS accepted charge handshake without flagging an incompatible cell error, and the Windows battery report returned correct chemistry and rated capacity values.
  • Fuel gauge recalibration after swap: After installation, run one full discharge to automatic shutoff, then charge uninterrupted to 100% without using the device. This gives the fuel gauge IC a complete voltage-curve reference against the new cell and corrects the percentage drift that commonly appears after a battery swap.

Surface Pro 6 shutting down at 15–25% battery remaining

This happens when the fuel gauge IC's stored discharge curve no longer matches the actual voltage cliff of the installed cell. The display backlight combined with active Wi-Fi draws enough current to cause a rapid voltage drop below the BMS cutoff threshold — even when the reported percentage still looks safe. The tablet interprets this as a critical low-voltage event and shuts down to protect the cell. One full calibration cycle — full discharge to shutoff, then uninterrupted charge to 100% — re-anchors the curve and pushes the reported shutoff point back below 10%.

Windows reporting incorrect battery percentage after replacement

The Surface Pro's fuel gauge IC calibrates its state-of-charge model against the original cell's charge and discharge profile. Swapping in a new cell leaves the stored model misaligned, so Windows displays a percentage that doesn't reflect actual remaining capacity. This shows up as sudden jumps — for example, dropping from 40% to 8% without warning, or sticking at 100% well into discharge. Fix it by running one complete discharge cycle to automatic shutoff, then charging uninterrupted to 100%. After that cycle, the IC rebuilds its reference curve against the new cell and percentage reporting stabilises.

Compatible Models

Surface Pro 6 1807 Surface Pro 5 Surface Pro 5 1796 Surface Pro 6

Replaces Part Numbers

DYNM02 G3HTA038H

Technical Specifications

Voltage7.57V
Amp Hours5900mAh
Capacity5900mAh
Rate44.66Wh
Net Weight195g /6.88 oz
Gross Weight335g /11.82 oz
Approximate Weight335g /11.82 oz
Dimension 228.50 x 120.00 x 4.30mm

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

After replacing the battery, fast charging stopped working on my Surface Pro 6 — the charger just trickle charges now. Why?

The Surface Pro uses USB Power Delivery negotiation between the charger and the battery management system. On a fresh cell, the BMS needs one complete accepted charge cycle before it signals the charge IC to allow higher current rates. Plug in the original Microsoft Surface Connect charger — third-party USB-C chargers may not complete the PD handshake correctly — and let it charge uninterrupted to 100%. Fast charge behaviour typically restores after that first full cycle.

My Surface Pro 6 gets noticeably warm near the top edge while charging the new battery. Is something wrong with the cell?

Heat near the top edge is normal during the first several charge cycles on a new lithium-polymer cell. The charge IC runs a conditioning phase at higher current on a fresh cell, which generates more heat than it will once the cell is broken in. As long as the surface stays warm rather than hot and the device doesn't throttle or shut down, the thermal output is within spec. If the chassis becomes too hot to hold comfortably, disconnect and check that the battery connector is fully seated — a partial connection increases resistance and heat.

The battery percentage drops faster from 100% to 80% than it does from 50% down. Is the new cell faulty?

This is fuel gauge drift, not a faulty cell. The gauge IC interpolates state-of-charge from a voltage curve calibrated to the old cell, so the top end of the curve reads inaccurately until recalibration. The drop feels steep at 100% because the stored reference doesn't match the new cell's actual open-circuit voltage profile at full charge. Run one complete discharge cycle — let the tablet run to automatic shutoff, then charge uninterrupted to 100% — and the IC will rebuild its curve. After that cycle, the percentage should track evenly across the full range.

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