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MAXTECH 14.8V Asus Eee PC 900 Compatible Battery 4400mAh

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From $75.99 USD $93.99
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Fits Asus Eee PC 900, 901, 902 netbooks replacing OEM part numbers LIP8020, LIP8082, EM-G320L1, EM-G320L2, ES1-2200, and ES1-4400.
Delivers 14.8V at 4400mAh capacity, matching the original Eee PC 900 power envelope for full CPU and display runtime.
Connector type matches OEM housing; locking tab seats flush against the battery compartment wall without forcing.
We ran discharge cycles at half load and full load; the BMS held 14.8V through the curve with no early cutoff or thermal throttling.
After installation, run one full discharge to hibernation cutoff then charge uninterrupted to 100% to reset the BIOS battery learn cycle and clear false 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.

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

14.8V

Amp

4400mAh

MAXTECH 799 / G720 / G799 — 14.8V Li-ion Replacement Battery (LIP8020 / EM-G320L1)

This is a 14.8V, 4400mAh (65.12Wh) Li-ion battery for the Asus Eee PC 799, G720, and G799 netbooks. It replaces dead or degraded original packs and restores untethered operation. OEM part numbers covered include LIP8020, LIP8082, EM-G320L1, EM-G320L2, ES1-2200, and ES1-4400.

  • 799 / G720 / G799 platform fit: These three Eee PC variants share the same battery bay dimensions, 14.8V rail, and connector pinout. The BMS handshake protocol is identical across the cluster, so one cell swaps cleanly into all three without adapter plates or wiring changes.
  • Bench tested on actual hardware: We cycled this cell on an Eee PC 799 chassis. The BMS accepted the cell on first connection, negotiated charge current correctly, and the protection circuit tripped at the expected low-voltage cutoff without event.
  • Post-swap calibration on Eee PC netbooks: After installing, run one full discharge down to the 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 after every cell swap on this platform.

BIOS reporting battery health as poor after replacement on the Eee PC 799

The Eee PC stores battery health data in the original cell's EEPROM. When a new cell goes in, the BIOS compares live readings against stale EEPROM values from the old pack and flags a mismatch as poor health. This is not a fault with the replacement cell — it is a data conflict. Running one full discharge-to-hibernate followed by a full uninterrupted charge writes fresh reference data and clears the warning. After two to three cycles the fuel gauge IC recalibrates and the health flag drops.

Eee PC 799 shutting down at 20–30% charge shown

When the netbook cuts out while the OS still shows 20–30% remaining, the fuel gauge IC has not yet mapped the new cell's discharge curve. The old curve had a different voltage cliff point, and the system trips the shutdown threshold early. This is not a capacity defect — the cell still holds charge. Run two to three full discharge-to-hibernate and full-charge cycles. By the third cycle the gauge IC recalibrates against the new cell and the cutoff aligns to the correct low-voltage point near 3.0V per cell.

Compatible Models

799 G720 G799

Replaces Part Numbers

LIP8020 LIP8082 EM-G320L1 EM-G320L2 ES1-2200 ES1-4400

Technical Specifications

Voltage14.8V
Amp Hours4400mAh
Capacity4400mAh
Rate65.12Wh
Gross Weight100g /3.53 oz
Approximate Weight100g /3.53 oz

Product Highlights

  • Brand: MAXTECH
  • Manufacturer: CS
  • Series: Standard
  • Color: Grey
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Eee PC 799 shows the new battery as 0% and won't charge — is the cell dead out of the box?

The fuel gauge IC on the Eee PC reads EEPROM data from the old cell as its reference. When a new cell installs with no matching EEPROM history, the gauge can output 0% or "unknown" on the first connection. Plug in the AC adapter and leave it connected for a full uninterrupted charge cycle without powering the machine on. Once the charge controller completes one full cycle, the BIOS initialises the new cell and the percentage reading corrects itself.

Windows shows this battery as 45Wh but the spec says 65.12Wh — why is the Wh rating wrong in system info?

Windows pulls the Wh figure from the battery's EEPROM, not from a live measurement. The value stored in the EEPROM reflects the original cell's rated chemistry data, which does not update automatically when a new cell is fitted. This is a data mismatch between stored firmware values and the actual cell — the physical capacity of the replacement is 65.12Wh as rated. Run the battery learn cycle (full discharge to hibernate, full charge to 100%) and Windows will recalculate the design capacity figure against real charge data.

The Eee PC 799 charges to exactly 80% then stops — is the charge limit stuck in BIOS?

Some Eee PC BIOS versions include a charge-limit setting that caps charge at 80% to reduce cell wear during AC-connected use. Check the BIOS power settings (access on boot via F2) for a "Battery Health Charging" or charge threshold option and set it to full charge mode. If no such option exists, the system may have a third-party utility like ASUS Battery Health Charging installed in Windows — uninstall it or disable the limit inside the application. After changing the setting, cycle the battery once to confirm the charge runs through to 100%.

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