About this replacement
Lenovo N22 Chromebook — 11.1V Li-Polymer Replacement Battery (5B10K88047)
This 11.1V, 3900mAh (43.29Wh) Li-Polymer battery replaces the original cell in the Lenovo N22 Chromebook and Chromebook N22-20 series. It fits models referenced under OEM part numbers 5B10K88047, 5B10K88048, L15L3PB1, L15M3PB1, and related variants. It restores battery-only operation to units where the original cell has degraded or failed.
- N22 Chromebook series fit: The N22, N22-20, and 80VH-series Chromebooks share the same three-cell Li-Polymer pack configuration, connector pinout, and BMS communication protocol — which is why a single part number covers the full lineup. Swapping a mismatched cell voltage or connector type will cause immediate BMS rejection.
- Bench tested on actual hardware: We ran this cell on an N22-20 unit and confirmed the BMS handshake completed without fault codes. The pack charged to full cutoff voltage and discharged to hibernate-level without triggering a protective shutdown at mid-range state of charge.
- Post-install calibration on the N22: After fitting this battery, run the charge down fully until the Chromebook hibernates on its own, then charge uninterrupted to 100%. Chrome OS uses this cycle to reset its fuel gauge IC against the new cell's actual capacity and clear the false "battery health poor" flag that appears after every cell swap on this platform.
Why Chrome OS shows "battery health poor" immediately after installing a new cell
Chrome OS stores battery health data in EEPROM tied to the original cell's charge history. When a new cell is installed, that stored data no longer matches the actual pack — so the OS flags it as degraded even though the cell is brand new. This is not a fault with the replacement battery. Running one complete discharge-to-hibernate followed by an uninterrupted full charge gives the fuel gauge IC new reference points and clears the warning.
N22 Chromebook shutting down at 20–30% battery shown on screen
This happens when the cell can no longer sustain voltage under combined CPU and display load — the pack voltage drops below the BMS cutoff threshold before the fuel gauge reaches 0%. On a worn original cell, this is a voltage cliff caused by internal resistance. On a freshly installed replacement, it almost always means the fuel gauge IC hasn't completed a calibration cycle yet and is reading state of charge from stale EEPROM data. Discharge fully to hibernate cutoff once, then recharge to 100% — after one full cycle the reported percentage and actual cutoff will align.