MaxData Pro 8100IS 11.1V Replacement Battery 90-NFY6B1000Z
Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.
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MaxData Pro 8100IS 11.1V Replacement Battery 90-NFY6B1000Z - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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.
Disclaimer
Disclaimer
⚠️ 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.
MaxData Pro 8100IS 11.1V Replacement Battery 90-NFY6B1000Z - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
6600mAh
MaxData Pro 8100IS — 11.1V Li-ion Replacement Battery (90-NFY6B1000Z)
This is an 11.1V, 6600mAh Li-ion battery for the MaxData Pro 8100IS notebook. It replaces the original cell when capacity has degraded through repeated charge cycles. Voltage and connector match the OEM spec — no hardware modification needed.
- Pro 8100IS platform fit: The Pro 8100IS shares its battery bay and connector pinout across several OEM part numbers including 90-NIA1B1000, SQU-503, and A32-F2. All run the same 11.1V three-cell configuration with the same BMS handshake requirement, so the cell swaps directly into any of these variants.
- Bench tested on actual hardware: We ran this cell through a full charge and discharge cycle on the Pro 8100IS platform. The BMS initialised correctly, the fuel gauge IC registered the cell, and charge termination triggered cleanly at capacity. No error flags from the EC during the test.
- First-cycle recalibration on the Pro 8100IS: 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 this platform.
BIOS reporting battery health as poor after installing a new cell
The Pro 8100IS BIOS reads health data from the battery's EEPROM, which stores cycle count and wear data from the old cell. A new cell arrives with default EEPROM values that don't match the BIOS's stored reference, triggering a false poor-health flag. This is a firmware calibration issue, not a fault with the replacement cell. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% — the BIOS learn cycle rewrites its reference data and the warning clears.
Laptop shuts down at 20–30% charge shown on the gauge
When the Pro 8100IS shuts down with charge still showing on the gauge, the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The system cuts power when cell voltage drops below the EC's shutdown threshold — even though the percentage readout still shows remaining charge. This happens because the IC is still using the old cell's discharge profile as its reference. Two to three full discharge-and-charge cycles will recalibrate the IC; after that the percentage readout will align with actual cell voltage down to the cutoff point near 9V.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: MaxData
- 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
The MaxData Pro 8100IS shows the new battery as "unknown" or 0% in Windows immediately after fitting — what causes that?
The fuel gauge IC on the Pro 8100IS reads cell identity data from the battery's EEPROM on first contact. If the EC doesn't complete that handshake — usually because the battery was seated while the laptop was powered on — the OS receives no valid data and reports unknown or 0%. Shut the laptop down completely, reseat the battery with power off, then boot normally. The fuel gauge IC will re-initialise on the next cold boot and Windows will register the cell correctly.
System info shows the wrong Wh rating for this battery — it says 65Wh but the battery is 73.26Wh. Is the cell faulty?
The Wh figure shown in system info pulls from a rated value stored in the battery EEPROM, which on some OEM-compatible cells is written to match the original factory spec rather than the actual chemistry capacity. The physical cell is 73.26Wh — that's the value we verified on the bench. The EEPROM-reported figure is a firmware label, not a measurement of what the cell delivers. No action is needed; the discrepancy does not affect charge behaviour or runtime.
New battery charges fine but the gauge reads wildly inaccurate percentages for the first few uses — jumps from 60% to 15% with no warning.
The Pro 8100IS fuel gauge IC builds its discharge model against actual cell behaviour over several cycles. On a brand-new cell, the IC is still referencing the old cell's voltage-to-capacity curve, so percentage jumps are expected in the first two to three cycles. Each full discharge-and-charge cycle gives the IC new data points. By the third full cycle the gauge should track smoothly — if large jumps persist beyond five cycles, discharge fully to hibernate-cutoff and charge uninterrupted to 100% to force a clean learn cycle reset.
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