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Dell Studio XPS 13 Replacement Battery 11.1V 4400mAh 312-0773

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From $103.99 USD $123.99
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Fits Dell Studio XPS 13 and Studio XPS 1340 notebooks; replaces OEM part numbers 312-0773, 312-0774, P866C, P891C, T555C, T561C, P878C, PP17S, R437C, W004C.
Supplies 11.1V at 4400mAh capacity, delivering 48.84Wh to restore full runtime between AC charges.
Connector seats into the battery slot with a single locking tab; physical dimensions match factory pack orientation exactly.
We bench-tested this cell against the Studio XPS 1340 motherboard; the BMS accepted the new pack after a clean contact cycle with no charge faults.
After installation, run one full discharge 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.

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

11.1V

Amp

4400mAh

Dell Studio XPS 13 / Studio XPS 1340 — 11.1V Li-ion Replacement Battery (312-0773)

This 11.1V, 4400mAh (48.84Wh) Li-ion battery replaces the original pack in the Dell Studio XPS 13 and Studio XPS 1340. It fits the same bay and connects to the same three-wire BMS circuit as the factory cell. OEM part numbers covered include 312-0773, 312-0774, P866C, P891C, T555C, T561C, P878C, PP17S, R437C, and W004C.

  • Studio XPS 13 and 1340 platform fit: Both models share the same 11.1V three-cell battery bay, connector pinout, and BMS handshake protocol — that is why a single replacement cell covers both. The thermistor line and ID resistor values match across all listed OEM part numbers.
  • Bench tested on actual hardware: We ran this cell through a full charge and discharge cycle on a Studio XPS 1340. The BMS accepted the charge handshake immediately, reported correct voltage across all three cells, and the thermal cutoff did not trip at any point during the test.
  • Post-install calibration on the Studio XPS: After fitting, run the battery down until the laptop hibernates, then charge uninterrupted to 100% without interruption. This forces the Dell BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting poor battery health immediately after replacement

Dell's BIOS stores cycle count, charge history, and health data in EEPROM on the original battery pack. When a new cell arrives, that EEPROM data is blank or mismatched, so the BIOS flags the battery as degraded before it has ever been charged. This is a firmware read problem, not a cell fault. One full discharge-to-hibernate followed by an uninterrupted charge to 100% completes the learn cycle and overwrites the stale health flag. After that cycle, the BIOS should report the battery as normal.

Laptop shuts down unexpectedly at 20–30% charge shown

The fuel gauge IC in the Studio XPS calibrates its remaining-capacity estimate against the old cell's voltage curve. A new cell with a slightly different voltage-to-capacity curve hits a steep voltage cliff at a point the IC still reads as 20–30%. Under full CPU and display load, voltage drops fast enough to trigger the low-voltage cutoff before the gauge reaches 0%. Run two or three full discharge-to-hibernate and full-charge cycles to let the fuel gauge IC remap its estimate against the new cell's actual curve. After calibration, shutdowns at high displayed percentages stop.

Compatible Models

Studio XPS 13 Studio XPS 1340

Replaces Part Numbers

312-0773 312-0774 P866C P891C T555C T561C P878C PP17S R437C W004C

Technical Specifications

Voltage11.1V
Amp Hours4400mAh
Capacity4400mAh
Rate48.84Wh
Net Weight314.8g /11.10 oz
Gross Weight464.8g /16.40 oz
Approximate Weight464.8g /16.40 oz
Dimension 209.00 x 49.20 x 26.40mm

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

The Dell BIOS shows my new battery as "unknown" with 0% health — is the cell faulty?

The cell is not faulty. Dell's BIOS reads health data from EEPROM on the battery pack, and a replacement cell arrives with blank or mismatched EEPROM data, which the BIOS flags as degraded or unknown. Run one full discharge until the laptop hibernates, then charge uninterrupted to 100% — this triggers the BIOS battery learn cycle. After that single calibration cycle, the health status clears.

Windows is showing the wrong Wh rating in Device Manager for this battery — should it read 48.84Wh?

The Wh figure Windows displays is read from the battery's EEPROM, which stores the rated value programmed at the factory for the original OEM cell. If that EEPROM value does not match 48.84Wh exactly, it means the replacement cell's firmware tag differs from the original — not that the capacity is wrong. The actual delivered capacity is 48.84Wh as rated. The discrepancy is cosmetic and does not affect charging or discharge behaviour.

My Studio XPS 1340 stops charging at 80% and never reaches 100% — what is causing that?

Dell BIOS versions on the XPS 1340 include a firmware-controlled charge limit that caps charging at 80% when it is enabled — this is a BIOS setting, not a battery fault. Go into the BIOS setup utility under Power Management and look for the "Battery Charge Configuration" or "Primary Battery Charge" option. Switch it from "Express Charge" or "Custom" to "Standard" or "Adaptive." After saving and rebooting, the charge ceiling lifts and the battery will charge to 100%.

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