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Dell Latitude 5580 Replacement Battery NY5PG 11.4V 85.5Wh

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New arrival
From $118.99 USD $143.99
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Fits Dell Latitude 5580, Precision 15 3520, and Latitude 5591 — replaces NY5PG, VG93N, WFWKK.
11.4V 7500mAh Li-Polymer cell delivers 85.5Wh — matches original output for full runtime between charges.
Connector slides straight into the battery bay slot with locking tab on the left side — no force needed.
We bench-tested this cell on a Latitude 5580 under full CPU load; BMS held stable voltage until final 5% then cut normally.
After installation, run one full discharge to hibernate-cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings that appear 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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🔹 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

11.4V

Amp

7500mAh

Dell Latitude 5580 / Precision 15 3520 — 11.4V Li-Polymer Replacement Battery (NY5PG)

This 11.4V, 7500mAh (85.5Wh) Li-Polymer battery replaces the original cell in the Dell Latitude 5580, Latitude 5591, Precision 15 3520, and Precision 3520. It matches the OEM voltage rail, connector, and BMS communication protocol used across these models. If the original cell has degraded or no longer holds a usable charge, this is the direct swap.

  • Latitude 5580 / Precision 3520 platform compatibility: These models share the same battery bay dimensions, 11.4V three-cell architecture, and SMBUS handshake protocol. Part numbers NY5PG, VG93N, and WFWKK are cross-compatible across this platform because Dell used a unified power board spec across the 5580 and Precision 3520 lines.
  • Bench tested on actual hardware: We ran this cell on a Latitude 5580 chassis and confirmed SMBUS communication, BMS charge acceptance from 0% to 100%, and correct Wh reporting in Dell Power Manager without error flags.
  • BIOS battery learn cycle after install: After fitting this cell, 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 every cell swap on Dell Latitude hardware.

BIOS reporting poor battery health immediately after replacing the Latitude 5580 cell

The Dell BIOS reads health data stored in the battery's EEPROM, not from real-time cell measurements. When a new cell is installed, the EEPROM data does not match the BIOS's learned profile from the old cell, so it flags the battery as degraded or unknown. This is a calibration mismatch, not a fault with the replacement cell. Running one full discharge-to-hibernate then a full uninterrupted charge resets the learn cycle and clears the warning.

Latitude 5580 shutting down suddenly at 20–30% battery shown

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge predicts a higher remaining capacity than the cell can sustain under combined CPU and display load, so the voltage drops below the BMS cutoff threshold before the displayed percentage reaches zero. The laptop shuts down to protect the cell — it is not a faulty battery. Run two to three full charge and discharge cycles and the fuel gauge will remap its estimates to match the new cell's actual characteristics, typically stabilising around 11.1V at the low end.

Compatible Models

Latitude 5580 Precision 15 3520 Latitude 5591 Precision 3520 Precision 3530

Replaces Part Numbers

NY5PG VG93N WFWKK

Technical Specifications

Voltage11.4V
Amp Hours7500mAh
Capacity7500mAh
Rate85.5Wh
Net Weight418g /14.74 oz
Gross Weight678g /23.92 oz
Approximate Weight678g /23.92 oz
Dimension 339.60 x 104.32 x 9.72mm

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

Dell Power Manager is showing the wrong Wh rating after I swapped the battery on my Latitude 5580 — is something wrong with the cell?

The Wh figure Dell Power Manager displays pulls directly from the EEPROM embedded in the battery, not from a live measurement. New cells sometimes carry a factory EEPROM value that differs slightly from the rated 85.5Wh until the BIOS completes a full learn cycle. Run one complete discharge to hibernate cutoff followed by an uninterrupted charge to 100%, and the reported Wh value will update to match the actual cell rating.

My Latitude 5580 fuel gauge is jumping around wildly — showing 60%, then 40%, then back to 55% within minutes of unplugging.

The fuel gauge IC on the Dell Latitude 5580 calibrates its state-of-charge model against the specific charge and discharge curve of the installed cell. After a cell swap, the IC is still running estimates based on the old cell's profile, which causes erratic percentage jumps under variable CPU and display loads. This is not a sign of a defective battery. Complete two to three full charge and discharge cycles and the IC will rebuild its model against the new cell, bringing the gauge back to stable readings.

New Latitude 5580 battery stopped charging at 80% and won't go any higher — is the cell faulty?

It is almost certainly not a cell fault. Dell's BIOS includes a built-in charge limit feature — sometimes called "Primary AC Use" or a custom charge threshold in Dell Power Manager — that caps charging at 80% to reduce cycle wear when the laptop is docked most of the time. Check Dell Power Manager under the Battery section and confirm the charge threshold is set to 100%. Once that setting is corrected, the cell will charge fully to 11.4V.

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