Sager NP660/862 Replacement Battery 10.8V 6600mAh DR202

Sager NP660/862 Series — 10.8V Li-ion Replacement Battery (DR202)

This is a 10.8V, 6600mAh (71.28Wh) lithium-ion battery for the Sager NP660, NP862, NP6200, NP8100, and NP8300 notebook computers. It replaces OEM part numbers DR202, EMC36, ME202BB, NL2020, and SMP02. If your original cell no longer holds a charge or your laptop shuts down unexpectedly, this cell restores full capacity.

• NP660/862 and NP8x00 platform fitment: These models share the same 10.8V three-cell-series configuration, connector pinout, and BMS handshake protocol — which is why one cell covers the full range from NP660 through NP8300.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on NP8100 hardware. The BMS accepted the pack without fault codes, balanced across all cell groups, and the fuel gauge IC tracked state-of-charge accurately after two calibration cycles.
• Post-install discharge cycle on Sager notebooks: After fitting this cell, run the laptop down to hibernate cutoff on battery alone — no AC during discharge — then charge uninterrupted to 100%. This triggers the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

Why the Sager NP8x00 reports poor battery health immediately after a cell swap

The BIOS on these notebooks reads health data stored in the EEPROM of the original cell. When a new cell goes in, that EEPROM data is either absent or mismatched, so the BIOS flags the pack as degraded before it has run a single cycle. This is not a fault with the replacement cell. One full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites the learn cycle data and resolves the warning. After two or three cycles the OS fuel gauge will stabilise and report accurately.

Laptop shuts down at 20–30% charge shown on the gauge

This happens when the cell voltage drops sharply under combined CPU and display load — a voltage cliff the fuel gauge IC did not anticipate because it was still calibrated to the old, degraded cell. The system interprets the sudden sag as empty and cuts power to protect the board. Run two full discharge-to-hibernate cycles with the screen at full brightness and the laptop under normal workload. After calibration, the gauge maps the new cell's discharge curve correctly and the early shutdown stops. If it persists past three cycles, check that the charge level shown at cutoff is dropping — it should move toward 5% or below.