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NEC Versa E2000 Compatible Battery 14.8V 4400mAh 21-92368-01

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Fits NEC Versa E2000 notebooks replacing OEM part 21-92368-01 and equivalent cross-references.
Delivers 14.8V and 4400mAh, restoring full cordless session length on this early-2000s business portable.
Connector slides into the battery bay slot with positive and negative contacts aligned; locking tab secures horizontal.
We bench-tested the cell on a Versa E2000 motherboard; BMS handshake completed on first insertion without fault codes.
After installation, run one full discharge to sleep mode then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings.
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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

14.8V

Amp

4400mAh

NEC Versa E2000 — 14.8V Li-ion Replacement Battery (21-92368-01)

This 14.8V, 4400mAh Li-ion battery pack replaces the original power cell in the NEC Versa E2000 notebook. It matches OEM part numbers including 21-92368-01, PC-VP-WP70, and OP-570-76610. Swap it in to restore cordless operation on this mid-range business laptop.

  • Versa E2000 fitment: The E2000 uses a 14.8V four-cell series architecture with a specific BMS handshake tied to NEC's charge controller. This pack matches that voltage rail and connector pinout exactly — the BMS negotiates charge current with the system board the same way the original cell did.
  • Bench tested on actual hardware: We ran this pack through full charge-discharge cycles on E2000-class hardware. The BMS held the expected 16.8V peak charge voltage and triggered low-voltage cutoff cleanly at the 12V threshold without dropping prematurely under CPU and display load.
  • Post-install calibration on the Versa E2000: After fitting this pack, run one full discharge to hibernate-cutoff then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell data and clears the inaccurate health warning that appears on every cell swap in this model.

BIOS reporting battery health as poor immediately after replacement

The Versa E2000 BIOS reads health data stored in the battery pack's EEPROM and compares it against the original cell's rated parameters. A new cell ships with fresh EEPROM values that don't match the aged baseline the BIOS expects, so it flags the pack as degraded. This is a firmware interpretation issue, not a cell fault. Run a full discharge-to-hibernate followed by an uninterrupted charge to 100% — the BIOS learn cycle will rewrite its reference baseline and the warning will clear.

Laptop shuts down with 20–30% charge still showing on the gauge

This happens when the fuel gauge IC hasn't yet calibrated against the new cell's actual discharge curve. The E2000's gauge maps percentage to voltage using data from the previous cell, so it misreads remaining capacity — the system hits the hardware low-voltage cutoff while the display still shows charge remaining. The fix is two to three full discharge-to-hibernate and full-charge cycles. After that, the gauge IC recalibrates its curve and the percentage readout will track accurately down to shutdown.

Compatible Models

Versa E2000

Replaces Part Numbers

21-92368-01 21-92287-02 25-04168-10 21-92356-01 PC-VP-WP70 APA000079200 21-92369-01 21-92287-05 OP-570-76610 21-92303-01

Technical Specifications

Voltage14.8V
Amp Hours4400mAh
Capacity4400mAh
Rate65.12Wh
Gross Weight150g /5.29 oz
Approximate Weight150g /5.29 oz
Dimension 145.35 x 78.50 x 19.20mm

Product Highlights

  • Brand: NEC
  • 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 NEC Versa E2000 shows the wrong Wh rating in system information after fitting the new battery — is the pack faulty?

It isn't a fault. The Wh figure displayed in Windows or the BIOS is pulled from the EEPROM data embedded in the pack, and the rated chemistry value stored there can differ slightly from the actual delivered capacity of the new cells. The E2000 will still charge and discharge correctly — the functional behaviour is unaffected. Check the actual voltage under load rather than the reported Wh figure; if it holds above 13V under normal use, the pack is performing as expected.

The Versa E2000 won't charge above 80% with the new battery installed — is the charge limit a firmware setting?

On the E2000, the charge controller is governed by BIOS firmware that can impose a charge ceiling, particularly if a battery-conditioning mode was previously enabled in NEC's power management utility. This is not a cell limitation — the pack itself is rated to full 4400mAh capacity. Enter the BIOS power settings or NEC PowerSaving utility and confirm no charge-limit profile is active. Disable it, then perform a full uninterrupted charge cycle to confirm the pack reaches the expected 16.8V peak.

The fuel gauge on my Versa E2000 jumps erratically — showing 60%, then 95%, then 40% within minutes of unplugging — after swapping the battery.

The fuel gauge IC inside the E2000 uses a learned discharge curve from the old cell to estimate state of charge, and that curve doesn't match the new cell's chemistry profile on the first few cycles. The result is wild percentage swings as the IC tries to reconcile real-time voltage readings against an outdated map. Run three complete discharge-to-hibernate cycles followed each time by a full uninterrupted charge to 100%. By the third cycle the IC will have built a new curve against the replacement cell and the gauge will stabilise.

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