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Dell Studio XPS 16 Compatible Battery 11.1V 6600mAh 312-0815

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From $127.99 USD $153.99
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Fits Dell Studio XPS 16, Studio XPS M1640 and replaces OEM part 312-0815, X411C, W303C, U011C, 312-0814, W298C, 451-10692.
11.1V and 6600mAh capacity restores full charge cycles on this 73.26Wh pack after original cell degradation.
Connector seats flat into the battery slot with a single locking tab on the left side — no force needed.
We bench-tested against OEM 312-0815 spec; BMS reported correct voltage under load and accepted full charge without cutoff faults.
After installation, discharge fully to hibernation cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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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⚠️ 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

6600mAh

Dell Studio XPS 1640 / 1647 — 11.1V Li-ion Replacement Battery (312-0815)

This 11.1V, 6600mAh Li-ion battery replaces the original cell in the Dell Studio XPS 16, Studio XPS 1640, Studio XPS M1640, and Studio XPS 16 1647. It matches OEM part numbers 312-0815, X411C, W303C, U011C, W298C, and 451-10692. Same voltage rail and connector as the factory cell.

  • Studio XPS 16 series fit: The 1640 and 1647 share the same battery bay geometry, 11.1V rail, and BMS handshake protocol. One cell covers both boards without modification or adapter.
  • Bench tested on actual hardware: We cycled this cell through charge, full-load discharge, and BMS cutoff on a Studio XPS 1640 board. The BMS accepted the cell without fault codes and the protection circuit tripped cleanly at the low-voltage threshold.
  • Post-install calibration on Dell XPS laptops: After installing, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.

Why the Studio XPS 16 shuts down at 20–30% after a battery swap

The Studio XPS 16 uses a fuel gauge IC that stores discharge curve data from the previous cell. When a new cell goes in, the IC is still reading against the old cell's curve. Under combined CPU and GPU load, voltage drops faster than the IC predicts, triggering an emergency shutdown before the displayed percentage reaches zero. This is a calibration gap, not a fault with the replacement cell. Run two full discharge-to-hibernate cycles and let the IC re-learn the new cell's curve. After the second cycle, the gauge and shutdown behaviour should align with actual remaining capacity.

BIOS reports battery health as "poor" or "replace" immediately after install

Dell's BIOS reads health status from EEPROM data written by the original cell — cycle count, rated Wh, and wear level. A new cell carries a fresh EEPROM, which the BIOS flags as a mismatch against its stored baseline. The warning does not mean the cell is defective. Boot into the Dell BIOS battery diagnostics (F2 at POST, then Diagnostics), run the battery test, and let it complete a full learn cycle. The health flag clears once the BIOS writes a new baseline from the replacement cell's data.

Compatible Models

Studio XPS 16 Studio XPS 1640 Studio XPS M1640 Studio XPS 16 1647 Studio XPS 16 1645 Studio XPS 1645 Studio XPS 1647

Replaces Part Numbers

312-0815 X411C W303C U011C 312-0814 W298C 451-10692

Technical Specifications

Voltage11.1V
Amp Hours6600mAh
Capacity6600mAh
Rate73.26Wh
Net Weight433g /15.27 oz
Gross Weight743g /26.21 oz
Approximate Weight743g /26.21 oz
Dimension 293.00 x 49.20 x 40.50mm

Product Highlights

  • Brand: Dell
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Studio XPS 16 fuel gauge is jumping around wildly — showing 60%, then 40%, then 75% within minutes. Is the new battery faulty?

The fuel gauge IC on the Studio XPS 16 needs several full discharge-and-charge cycles to calibrate against a new cell's chemistry. Until it does, the state-of-charge readings are extrapolated from the old cell's discharge curve and will be erratic. The cell itself is not faulty. Run two complete discharge cycles — discharge to hibernate cutoff, then charge uninterrupted to 100% — and the gauge will stabilise.

The new battery shows the correct 73Wh on the label, but Windows and the BIOS are reporting a lower Wh rating in system info. Why?

The Wh figure Windows and the Dell BIOS display is pulled from the EEPROM embedded in the battery controller, not from a live capacity measurement. The EEPROM on a replacement cell is programmed to rated chemistry specs, which can differ slightly from what the system's power manager expects based on the original cell's stored data. This is a data mismatch between the old EEPROM baseline and the new cell — it does not affect actual charge capacity. After one or two full calibration cycles, the reported value typically aligns closer to the rated 73.26Wh.

The Studio XPS 16 stops charging at exactly 80% and won't go higher, even on a full overnight charge. What's causing that?

Dell's BIOS includes a charge-limit feature called "Primarily AC" or battery conservation mode — when enabled, it instructs the charging circuit to stop at 80% to reduce cell wear. Check the Dell Power Manager application (or the BIOS under Power Management) and confirm the charge mode is set to "Adaptive" or "Full Charge" rather than "Primarily AC Use." Switching that setting to Full Charge will allow the cell to reach 100%.

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