Northgate NB86 Replacement Battery 10.8V 6600mAh DR202

Northgate NB86 — 10.8V Li-ion Replacement Battery (DR202)

This is a 10.8V, 6600mAh Li-ion battery for the Northgate NB86 notebook. It replaces part numbers DR202, EMC36, ME202BB, NL2020, and SMP02. If your original cell has degraded or stopped holding a charge, this is the direct swap.

• NB86 platform fit: All listed OEM part numbers — DR202, EMC36, ME202BB, NL2020, SMP02 — share the same connector pinout, voltage rail, and BMS handshake profile on the NB86. One cell revision, multiple part numbers across production runs.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the NB86 platform. The BMS communicated correctly with the system, charge termination triggered at full capacity, and the protection circuit responded normally to load.
• NB86 calibration cycle after install: After fitting this cell, run the laptop down to hibernate cutoff, then charge it uninterrupted to 100% before using it again. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting battery health as poor after fitting a new cell

The NB86 BIOS reads health data from EEPROM stored on the battery's protection board. When you swap cells, that EEPROM data no longer matches the new cell's actual charge curve, so the BIOS flags a health warning even though the cell is new. This is a data mismatch, not a fault. Running one full discharge-to-hibernate followed by an uninterrupted full charge lets the BIOS recalibrate against the new cell. After that cycle, the health warning clears and the fuel gauge reads accurately.

NB86 shutting down abruptly at 20–30% charge shown

This happens when the cell voltage drops sharply under combined CPU and display load — a voltage cliff the fuel gauge IC did not predict. The OS was reading a percentage calculated from a charge curve that no longer matched the degraded or freshly calibrated cell. The BMS trips to protect the cell before the gauge reaches zero. After completing the full calibration cycle described above, the fuel gauge IC maps the new cell's discharge curve correctly and the shutdowns stop. Confirm the fix by watching the cell voltage hold above 10.2V under sustained load.