DR202 Clevo 66 Replacement Battery 10.8V 6600mAh

Clevo 66 / 82 / 86 Series — 10.8V Li-ion Replacement Battery (DR202 / ME202BB)

This is a 10.8V, 6600mAh (71.28Wh) Li-ion replacement battery for Clevo notebook computers. It fits the 66, 82, 82H, and 86 series, along with nine additional compatible models. It restores power to systems where the original cell has degraded or failed entirely.

• Clevo 66 / 82 / 86 platform fit: These models share the same voltage rail, physical connector, and BMS handshake protocol. OEM part numbers DR202, EMC36, ME202BB, NL2020, and SMP02 are cross-references for the same cell specification across this platform range.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on compatible hardware. The BMS communicated correctly with the system, charge termination triggered at the expected voltage ceiling, and the cell held capacity through repeated cycles without fault codes.
• First-cycle calibration after install: After fitting this battery, run the laptop from full charge down to automatic hibernate cutoff, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle and clears the inaccurate health warning that commonly appears after any cell swap on this platform.

BIOS reporting poor battery health immediately after installing a new cell

Clevo notebooks store battery health data in EEPROM on the old cell. When a new cell goes in, the BIOS compares live readings against stale EEPROM values and flags a mismatch as poor health. This is a data conflict, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite the learn cycle against the new cell. After two to three calibration cycles, the health indicator should resolve to a normal state.

Laptop shuts down suddenly at 20–30% battery shown on screen

This is a voltage cliff symptom — the fuel gauge IC is reading state-of-charge from a calibration curve that no longer matches the new cell's chemistry profile. Under combined CPU and display load, the actual cell voltage drops faster than the fuel gauge predicts, and the system hits the low-voltage cutoff before the displayed percentage reaches zero. It is not a cell defect. Run two full discharge cycles to hibernate cutoff, charging fully between each one. After recalibration, the fuel gauge curve aligns to the new cell and the premature shutdowns stop.