Asus Chromebook Flip C100 Replacement Battery C12N1432 3.85V

Asus Chromebook Flip C100PA Series — 3.85V Li-Polymer Replacement Battery (C12N1432)

This is a 3.85V, 7900mAh (30.42Wh) Li-Polymer battery for the Asus Chromebook Flip C100 and C100PA series convertible 2-in-1. It fits C100PA, C100PA-DB01, C100PA-DB02, and over 20 additional C100PA variants. Use this to restore power when the original cell no longer holds a useful charge.

• C100PA variant coverage: All listed C100PA models share the same 3.85V battery rail, physical connector, and BMS handshake protocol. The slim 3.43mm cell height is specific to the C100's thin convertible chassis — no modification needed.
• Bench tested on actual hardware: We ran this cell through charge, discharge, and tablet-mode rotation cycles on a C100PA unit. The BMS negotiated correctly with the ChromeOS charge controller and reported state-of-charge without fault flags.
• First-cycle calibration after install: After fitting this battery, let the Chromebook discharge fully until it hibernates, then charge uninterrupted to 100%. This forces the fuel gauge IC to re-learn the new cell's capacity curve and clears the inaccurate health warning ChromeOS displays after every cell swap.

ChromeOS reporting battery health as poor immediately after swap

ChromeOS reads battery health data from EEPROM values stored by the previous cell's charge controller. When a new cell is fitted, those stored values no longer match the actual chemistry — ChromeOS flags it as degraded before a single charge cycle runs. This is a calibration state, not a fault. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100%, and the health status will update to reflect the new cell.

Chromebook Flip shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC hasn't yet mapped the new cell's voltage curve. The displayed percentage is based on old EEPROM data, so the system thinks it has reserve capacity it doesn't actually have at that voltage point. Under combined CPU and display load, the cell hits its low-voltage cutoff before the OS expects it. Complete two full calibration cycles — discharge to hibernate, charge to 100% — and the gauge will track the actual cell voltage accurately from around 3.0V cutoff upward.