About this replacement
Acer Chromebook 714/715 Series — 7.6V Li-Polymer Replacement Battery (AP18F4M)
This is a 7.6V, 6800mAh (51.68Wh) Li-Polymer replacement battery for the Acer Chromebook 714 and 715 series. It fits the CB714-1WT-53FX, CB715-1WT-39HZ, CB715-1WT-57H9, CB715-1W-55XP, and over 100 additional CB714 and CB715 variants. OEM part numbers AP18F4M, KT.00404.001, and 2ICP5/54/90-2 all cross-reference to this cell.
- CB714 and CB715 shared platform: Both series run on the same 7.6V two-cell Li-Polymer configuration with a matching connector and BMS handshake protocol. The fuel gauge IC communicates charge state directly to Chrome OS, so the replacement cell must match the OEM voltage rail — this one does.
- Bench tested on actual hardware: We cycled this cell in a CB715-1WT unit. The BMS accepted charge without tripping, balanced both cells correctly, and Chrome OS reported battery status without error flags after the first full cycle.
- Post-install calibration on Chromebook hardware: After fitting this battery, discharge the Chromebook to automatic shutdown — not sleep — then charge uninterrupted to 100% without using the device. This resets the BIOS battery learn cycle and clears the inaccurate health warning Chrome OS displays after every cell swap.
Why Chrome OS flags a new battery as "poor health" immediately after installation
The Chrome OS battery health indicator reads EEPROM data written by the original cell during its lifetime. A new cell has no charge history logged, so the fuel gauge IC compares zero cycle data against the old cell's degraded baseline and reports a mismatch as poor health. This is a data state issue, not a cell defect. One full discharge-to-shutdown followed by a complete uninterrupted charge clears the stored cycle data and lets the fuel gauge IC re-baseline against the new cell.
Chromebook shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC still holds calibration data from the old, degraded cell. As load increases — CPU under active tabs plus display backlight — actual cell voltage drops faster than the uncalibrated gauge predicts, triggering a hard shutdown before the displayed percentage reaches zero. The fix is a calibration cycle: run the Chromebook on battery under normal load until it shuts itself off at low voltage, then charge to 100% without interruption. After two to three of these cycles, the gauge tracks actual cell voltage accurately and shutdowns at false percentages stop.