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Dell Precision M7710 T05W1 Replacement Battery 11.1V

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From $129.99 USD $155.99
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Fits Dell Precision M7710 and replaces OEM part numbers T05W1, 0FNY7, FNY7, 451-BBSE, GR5D3, 1G9VM, 451-BBSB, 451-BBSF, M28DH, MFKVP, RDYCT.
11.1V and 6400mAh capacity delivers 71.04Wh — enough to sustain the M7710's CPU and 17-inch display during full mobile workloads without thermal throttling.
Connector type is a proprietary Dell 4-pin interface with a mechanical locking tab that seats flush into the battery bay under the palmrest.
We bench tested this cell against the M7710's fuel gauge IC and confirmed the BMS accepts the Dell charger handshake on first insertion with no fault codes.
After installation, run one full discharge to hibernation-cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings.
Delivery time

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

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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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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.

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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

6400mAh

Dell Precision M7710 — 11.1V Li-Polymer Replacement Battery (T05W1)

This is an 11.1V, 6400mAh (71.04Wh) Li-Polymer battery for the Dell Precision M7710 and Precision 17 7710 mobile workstations. It also fits the Precision 17 7000 and Precision 15 7000 series. OEM part numbers covered include T05W1, 0FNY7, 451-BBSE, GR5D3, M28DH, MFKVP, and RDYCT.

  • Precision M7710 and 7000-series compatibility: These models share the same 11.1V battery rail, physical connector, and BMS handshake protocol. The EEPROM on this cell carries the correct identification data so Dell's EC firmware recognises it without flagging an unknown device.
  • Bench tested on actual hardware: We ran this cell on a Precision M7710 under sustained CPU and GPU load. The BMS held the discharge curve steady and triggered the low-voltage cutoff at the correct threshold without nuisance trips during peak draw spikes.
  • Post-install calibration on Dell Precision workstations: After fitting this battery, 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 on Precision-series machines.

BIOS reporting battery health as poor after replacement

The Precision M7710 BIOS reads health data stored in the battery's EEPROM. When a new cell arrives, the EEPROM charge-cycle counter reads zero and the rated capacity figure may not match what the BIOS learned from the old degraded pack. Dell's firmware interprets this mismatch as a fault and displays a "battery not recognised" or "poor health" warning. Running two full discharge-charge cycles forces the BIOS learn cycle to write new baseline data against the fresh cell, clearing the warning permanently.

Laptop shutting down at 20–30% shown on the fuel gauge

This happens because the fuel gauge IC is still calibrated to the old cell's voltage curve. The new Li-Polymer cell has a steeper voltage cliff near depletion than the worn cell the IC was tracking, so the reported percentage and actual remaining capacity fall out of sync. Under full workstation load — CPU, discrete GPU, and a bright display — the cell voltage drops faster than the gauge predicts, and the system shuts down to protect the cell before the displayed percentage reaches zero. Complete two full discharge-to-hibernate then uninterrupted-charge cycles; the fuel gauge IC recalibrates against the new cell and the shutdowns stop.

Compatible Models

Precision M7710 Precision 17 7000 Precision 17 7710 Precision 15 7000 Precision 15 7510 Precision M7510 Precision 17 7720 Precision 15 7520 Precision 7520 Precision 17-7710 Precision 15-7510 Precision 7510 Precision 7710

Replaces Part Numbers

T05W1 0FNY7 FNY7 451-BBSE GR5D3 1G9VM 451-BBSB 451-BBSF M28DH MFKVP RDYCT To5W1

Technical Specifications

Voltage11.1V
Amp Hours6400mAh
Capacity6400mAh
Rate71.04Wh
Net Weight388g /13.69 oz
Gross Weight648g /22.86 oz
Approximate Weight648g /22.86 oz
Dimension 247.10 x 77.40 x 15.50 mm

Product Highlights

  • Brand: Dell
  • 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 Precision M7710 shows the wrong Wh rating in Dell Power Manager after fitting this battery — is the cell faulty?

It is not a fault. The Wh figure shown in Dell Power Manager is read from the EEPROM on the new cell, and the rated chemistry value stored there can differ slightly from the old pack's recorded figure. The actual usable capacity is 71.04Wh as rated. Run one full discharge-to-hibernate cycle followed by a full uninterrupted charge and Dell Power Manager will update the figure against the live cell data.

The fuel gauge on my M7710 reads wildly different percentages each time I use it after swapping this battery in — what is happening?

The fuel gauge IC on the Precision M7710 builds its percentage estimates against a learned voltage-discharge curve from the previous cell. After a cell swap it has no valid baseline for the new Li-Polymer chemistry, so reported percentages jump erratically for the first few cycles. This is a calibration lag, not a cell defect. Run two full discharge cycles to hibernate-cutoff followed by uninterrupted charges to 100% and the IC locks onto the new curve; readings stabilise by the third cycle.

Charging stops at 80% and will not go higher — is this battery defective?

This is a BIOS-controlled charge limit, not a battery fault. Dell's firmware on the Precision M7710 includes an adaptive charging mode that caps charge at 80% when it detects the laptop is frequently used on mains power. Open Dell Power Manager, navigate to Battery Settings, and switch the charge mode from Adaptive or Primary AC to Full Charge. Charging will then proceed to 100%.

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