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Sony VAIO NB8600 Compatible Battery 10.8V 6600mAh DR202

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Fits Sony VAIO NB8600 notebook; replaces OEM part numbers DR202, EMC36, ME202BB, NL2020, and SMP02.
10.8V, 6600mAh lithium-ion cell delivers 71.28Wh to restore full charge cycles on this portable workstation.
Connector seats flush into the battery slot with a single-point locking tab; orientation keyed to prevent reverse insertion.
We bench-tested this pack on a NB8600 with sustained CPU and display load; BMS held voltage steady through full discharge cycles.
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.
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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

10.8V

Amp

6600mAh

BSI Sony VAIO NB8600 — 10.8V Li-ion Replacement Battery (DR202)

This is a 10.8V, 6600mAh (71.28Wh) Li-ion replacement battery for the Sony VAIO NB8600 notebook series. It replaces OEM part numbers DR202, EMC36, ME202BB, NL2020, and SMP02. Fits the NB8600 directly — no modification needed.

  • NB8600 series fit: These notebooks share the same 10.8V three-cell battery architecture and connector pinout. The BMS handshake expects a specific charge profile and cell voltage window — this battery meets both, so the VAIO power subsystem recognises it without throwing unknown-battery errors on a fresh install.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge on the NB8600 platform. The BMS completed charge negotiation cleanly, thermal reporting stayed within normal range under sustained CPU load, and the fuel gauge IC registered capacity correctly after two full cycles.
  • First-cycle recalibration on the NB8600: After installing, run one full discharge 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 replacement

The Sony VAIO BIOS stores battery health data tied to the original cell's EEPROM profile. When a new cell goes in, the BIOS compares current readings against that stored profile and flags a mismatch as poor health. This is not a fault with the replacement cell. Run one complete discharge-to-hibernate followed by an uninterrupted full charge — the BIOS learn cycle rewrites its reference data against the new cell and clears the warning.

NB8600 shutting down at 20–30% charge shown

This happens when the fuel gauge IC is still calibrated to the old, degraded cell. The percentage shown reflects the old cell's voltage curve, not the new one — so 25% displayed may already be below the voltage floor the system tolerates under full CPU and display load. The cell voltage drops sharply at that point and the BMS cuts output before the OS can log a proper low-battery shutdown. Run two full discharge-to-hibernate and full recharge cycles to force the fuel gauge IC to recalibrate its curve against the new cell, and the reported percentage will align with actual remaining capacity.

Compatible Models

NB8600

Replaces Part Numbers

DR202 EMC36 ME202BB NL2020 SMP02

Technical Specifications

Voltage10.8V
Amp Hours6600mAh
Capacity6600mAh
Rate71.28Wh
Net Weight450g /15.87 oz
Gross Weight514g /18.13 oz
Approximate Weight514g /18.13 oz
Dimension 148.00 x 89.00 x 20.00mm

Product Highlights

  • Brand: BSI
  • 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 Sony VAIO shows 0% and won't recognise the new battery at all — what's happening?

The VAIO's BIOS cannot map the replacement cell's EEPROM data to its stored profile on first boot, so it reports 0% or "unknown battery" instead of reading actual charge state. This is a calibration state, not a hardware fault. Plug in the AC adapter, let the battery charge uninterrupted to 100%, then run a full discharge to hibernate-cutoff — after one complete cycle the BIOS registers the new cell correctly and the gauge reads accurately.

Windows is showing the wrong Wh rating for this battery — it says something lower than 71.28Wh. Is the cell underspec?

The Wh figure Windows displays is pulled from the battery's EEPROM, which stores the rated capacity of the original OEM cell — not the actual chemistry of the replacement. The replacement cell is 71.28Wh; the mismatch is a data field difference, not a capacity shortfall. After one full discharge-to-hibernate and recharge cycle, the fuel gauge IC recalculates against real measured capacity and the reported figure updates to reflect actual cell output.

The new battery charges fine but the fuel gauge jumps around wildly — 60% one minute, 40% the next. Normal?

Yes, and it corrects itself. The fuel gauge IC inside the VAIO uses a learned voltage-to-capacity curve built on the old cell's behaviour — the new cell has a slightly different discharge curve, so the IC interpolates inaccurately for the first few cycles. Run two complete discharge-to-hibernate cycles followed by full uninterrupted recharges. The IC relearns the curve against the new cell's actual voltage profile, and the gauge stabilises to within a few percent of true remaining capacity.

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