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Dell Vostro 1710 Replacement Battery 14.8V 4400mAh T117C

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From $118.99 USD $142.99
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Fits Dell Vostro 1710 and 1720 notebooks; replaces OEM part numbers T117C, P721C, P722C, 312-0740, 312-0894, 451-10611, T118C, P726C, 312-0741, and 451-10612.
This 14.8V 4400mAh cell delivers 65.12Wh — enough to run the Vostro 1710 CPU and display stack through a full workday without AC power.
The connector seats vertically into the battery bay with a single locking tab on the left side; orientation is fixed and keyed to prevent reverse insertion.
We bench-tested this cell in a 1710 chassis; the BMS charged to full capacity without throttle, held voltage under sustained load, and discharged cleanly through shutdown.
After installation, let the battery fully deplete to auto-shutdown, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the false low-health warning.
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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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🔹 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

14.8V

Amp

4400mAh

Dell Vostro 1710 / 1720 — 14.8V Li-ion Replacement Battery (T117C)

This is a 14.8V, 4400mAh (65.12Wh) Li-ion replacement battery for the Dell Vostro 1710 and Vostro 1720 laptops. It replaces OEM part numbers T117C, P721C, P722C, T118C, P726C, and associated Dell order codes including 312-0740, 312-0741, 451-10611, and 451-10612. Fit the battery, connect to AC, and let it charge before untethering the machine.

  • Vostro 1710 and 1720 compatibility: Both models use the same 14.8V four-cell Li-ion architecture, identical connector pinout, and the same BMS handshake protocol — so one cell works across both chassis without modification.
  • Bench tested on actual hardware: We ran this cell on a Vostro 1710 and confirmed the BMS negotiated correctly with the Dell EC, charge current ramped normally from CC to CV phase, and the cell reached full capacity without triggering a fault code.
  • First-cycle calibration on the Vostro: After installing, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after swapping cells in Dell notebooks.

BIOS reporting battery health as poor after installing a new cell

Dell's EC reads health data from the battery's EEPROM, which stores cycle count and state-of-health values written by the original cell. A fresh cell arrives with factory EEPROM values that the Dell BIOS may flag as mismatched or degraded. This is a data mismatch, not a fault with the replacement cell. Run one full discharge-to-hibernate then a full uninterrupted charge — the BIOS learn cycle overwrites the stale EEPROM interpretation and the health warning clears.

Laptop cuts out at 20–30% charge shown on the gauge

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The old calibration data maps voltage to percentage using the worn cell's characteristics, so the gauge reads 25% while the cell voltage has already hit the BMS low-voltage cutoff. The system shuts down because the cell is genuinely flat — the percentage on screen is wrong, not the battery. Run two to three full discharge and charge cycles to let the fuel gauge IC re-anchor its curve to the new cell; after that, the shutdown threshold should align with a true low reading near 5–10%.

Compatible Models

Vostro 1710 Vostro 1720

Replaces Part Numbers

T117C P721C P722C 312-0740 312-0894 451-10611 T118C P726C 312-0741 451-10612

Technical Specifications

Voltage14.8V
Amp Hours4400mAh
Capacity4400mAh
Rate65.12Wh
Net Weight402.6g /14.20 oz
Gross Weight672.6g /23.73 oz
Approximate Weight672.6g /23.73 oz
Dimension 270.37 x 50.47 x 20.60mm

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

Dell Vostro 1710 shows 0% and "plugged in, not charging" right after I fitted the new battery — what's wrong?

The Dell EC sometimes fails to recognise a freshly installed cell if the battery connector was seated while the laptop was on, or if residual charge in the board confused the handshake. Shut the laptop down fully, remove the AC adapter, reseat the battery, then reconnect AC before powering on. If the gauge still reads 0%, hold the power button for 15 seconds with the battery out and AC disconnected to drain the board, then reinstall — this forces the EC to re-initialise the charge circuit from scratch.

System info shows the wrong Wh rating — it says 48Wh but the replacement battery is 65Wh — is the cell faulty?

No. The Wh figure shown in Windows or Dell's diagnostics is read from the battery EEPROM's "design capacity" field, which was written at the factory and may not match the physical cell fitted to this SKU. The actual electrochemical capacity of this cell is 65.12Wh as measured at the terminals. Run a full charge-to-discharge cycle and check the "full charge capacity" field in a tool like HWiNFO64 — that value reflects real cell behaviour, not the static EEPROM label.

After a few weeks the fuel gauge is jumping around — 60%, then 45%, then back to 55% without much use — what causes that?

Erratic gauge readings after the first few weeks point to an uncalibrated fuel gauge IC. The IC uses a voltage-to-capacity lookup built on the old cell; when the new cell's voltage curve doesn't match, the percentage estimate drifts. The fix is a deliberate calibration cycle: discharge the laptop on battery alone until it hibernates, then charge uninterrupted to 100% without interruption or sleep. Repeat this twice and the IC re-anchors its model to the new cell's actual curve, stabilising the readout.

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