Asus ZenBook Pro Duo 15 OLED C42N2008 Compatible Battery 15.48V

Asus ZenBook Pro Duo 15 OLED UX582LR Series — 15.48V Li-Polymer Replacement Battery (C42N2008)

This 15.48V, 5650mAh (87.46Wh) lithium-polymer battery replaces the C42N2008 cell in the Asus ZenBook Pro Duo 15 OLED UX582LR series. It fits the dual-screen 15-inch OLED notebook lineup, including the BP1979R, H2002TS, H2002R, and LR-1BH2 variants. OEM part numbers covered are C42N2008 and 0B200-03840000.

• UX582LR platform fit: Every model in the UX582LR line shares the same four-cell 15.48V battery architecture, connector pinout, and BMS handshake protocol — which is why one cell covers 15 or more UX582 variants without modification.
• Bench tested on actual hardware: We ran this cell through charge, load, and BMS communication checks on the UX582 platform. The BMS authenticated correctly, charge termination triggered at the expected voltage ceiling, and thermal sensors reported without error flags.
• Post-install calibration on the ZenBook Pro Duo: After fitting this cell, 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 the UX582 platform.

Why the UX582LR shuts down at 20–30% shown on the fuel gauge

The ZenBook Pro Duo 15 runs two OLED panels simultaneously alongside a high-TDP CPU — that combined draw can pull the battery voltage down faster than the fuel gauge IC can track. When the cell voltage drops below the BMS cutoff threshold under that full load, the laptop shuts off even though Windows or macOS still reports 20–30% remaining. The fuel gauge IC is reading a charge estimate calibrated to the old cell's degraded discharge curve, not the new cell's. Run two or three full discharge-to-hibernate and full-charge cycles to let the IC recalibrate its voltage-to-capacity mapping against the replacement cell.

BIOS reports battery health as "poor" or "replace" immediately after swap

The UX582LR BIOS reads health data from the battery's EEPROM, which stores cycle count and state-of-health figures written by the original cell. A new cell arrives with factory EEPROM values that do not match what the BIOS expects from a freshly installed battery, triggering a false poor-health flag. This is a data mismatch, not a fault with the replacement cell. To clear it, run a full discharge to hibernate cutoff followed by an uninterrupted charge to 100% — after one complete learn cycle, the BIOS recalculates health from live voltage data and the warning clears.