About this replacement
Asus ZenBook Pro 15 OLED UM535QE Series — 11.55V Li-Polymer Replacement Battery (C32N2002)
This is an 11.55V, 8150mAh (94.13Wh) lithium-polymer battery for the Asus ZenBook Pro 15 OLED UM535QE-KY195W and related ZenBook Pro 15 and ZenBook Flip 15 models. It replaces OEM part numbers C32N2002 and 0B200-03770000. If your original cell is swelling, failing to hold a charge, or draining unusually fast under display and CPU load, this is the direct swap.
- ZenBook Pro 15 and Flip 15 compatibility: These models share the same 11.55V three-cell architecture, connector pinout, and BMS handshake protocol — which is why a single cell covers both the fixed-hinge Pro 15 and the 360-degree Flip 15 UX564 chassis.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on ZenBook Pro 15 hardware. The BMS handshake initialised correctly, charge current tapered as expected near full capacity, and no fault codes triggered during load testing with the OLED panel active.
- Post-install recalibration on ZenBook firmware: After fitting this cell, run one full discharge until the laptop hibernates at cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in MyASUS after every cell swap.
BIOS reporting battery health as poor immediately after replacement
This is an EEPROM carry-over issue, not a fault with the new cell. The BIOS reads health data stored in the old cell's EEPROM and flags the replacement as degraded because the counters don't match. The MyASUS app will often show a yellow or red health status within minutes of first boot. Run the full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% — this forces the fuel gauge IC to write fresh cycle data and clears the warning on the next BIOS read.
Laptop shutting down at 20–30% shown on the fuel gauge
This symptom appears when the fuel gauge IC hasn't yet calibrated against the new cell's actual voltage curve. Under combined CPU and OLED panel load, the reported state-of-charge and the real cell voltage diverge — the BMS hits its low-voltage cutoff before the gauge reaches zero. It is not a defective cell. Complete two to three full discharge-and-charge cycles without interruption. After calibration, the gauge and the BMS cutoff will align; the laptop should run down to below 10% before shutting off. If it still cuts out early, check that the BIOS is not set to a custom battery care limit below 30%.