Acer Chromebook Spin 511 AP19A5K Replacement Battery 11.55V

Acer Chromebook Spin 511 R752T Series — 11.55V Li-Polymer Replacement Battery (AP19A5K)

The AP19A5K is an 11.55V, 3400mAh (39.27Wh) Li-Polymer cell that fits the Acer Chromebook Spin 511 R752T line, including the R752T-C3M5, R752T-C6LD, R752T-C2YP, and R752T-C6MW among others. This is a convertible 2-in-1 Chromebook — it runs as both a notebook and a tablet. The replacement restores power to a unit where the original cell has degraded or stopped holding charge.

• R752T series compatibility: All R752T variants listed share the same 11.55V voltage rail, physical connector, and BMS handshake profile. The AP19A5K part number spans the full sub-range, so the same cell works across those 16+ model suffixes without modification.
• Bench tested on actual hardware: We ran the cell through charge and discharge cycles on the R752T platform. The BMS negotiated correctly with the Chromebook's charge controller, accepted a full charge to 11.55V, and hit rated capacity without triggering any protection cutoff during the draw phase.
• Post-install calibration on ChromeOS: After fitting the new cell, run one full discharge until the Chromebook hibernates, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in ChromeOS diagnostics after a cell swap.

Why the R752T shuts down at 20–30% after a battery swap

The fuel gauge IC on the R752T motherboard stores calibration data from the original cell. After a swap, that data no longer matches the new cell's discharge curve. The Chromebook reads a voltage level that looks critical to the old curve and cuts power — even though actual capacity remains. Running two or three full discharge-and-charge cycles forces the fuel gauge IC to remap against the new cell's actual voltage cliff, which typically sits below 10.8V under combined CPU and display load.

ChromeOS Diagnostics showing incorrect Wh rating after replacement

The Wh figure shown in ChromeOS Diagnostics pulls from EEPROM data written by the battery's own management chip, not from a live capacity measurement. A new AP19A5K cell carries EEPROM values rated to the cell's nominal chemistry, which can display as a slightly different Wh number than the original OEM pack. This is not a fault — the cell is delivering the correct 39.27Wh. Confirm actual charge level by checking the status bar percentage rather than the Diagnostics Wh readout.