About this replacement
Dell Inspiron 14 7466 / 7467 — 15.2V Li-ion Replacement Battery (PWKWM)
This is a 15.2V, 3500mAh (53.2Wh) Li-ion replacement battery for the Dell Inspiron 14 7466 and 7467 laptops. It slots into the same bay as the original PWKWM cell and connects through the same 4-pin BMS interface. Fits the Inspiron 14 7000 series including P78G and associated variants.
- 7466 / 7467 platform fit: Both models share the same 15.2V four-cell architecture and the same BMS handshake protocol. The connector pinout and locking tab geometry are identical across the P78G board revision, so one cell covers the full run.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a 7466 unit. The BMS negotiated correctly, the charge controller accepted full current, and the fuel gauge IC tracked state-of-charge without a reset error on the first cycle.
- Post-install discharge cycle: After fitting this cell, run the laptop on battery until it hibernates, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.
BIOS reporting battery health as poor after replacement
The Dell BIOS reads health data from EEPROM stored on the original cell. When a new cell arrives, that EEPROM data is blank or mismatched, so the BIOS flags the battery as degraded or unknown — even when the cell is physically fine. This is not a fault with the replacement. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% and the BIOS learn cycle will write fresh calibration data to the new cell's EEPROM. After one or two cycles the health indicator clears.
Laptop 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. Under combined CPU and display load, the new cell's actual voltage floor doesn't match the old discharge curve, so the system hits a hard cutoff before the percentage reaches zero. It is a calibration lag, not a faulty battery. Force a full discharge to hibernate — the shutdown will occur — then charge to 100% without interruption. Repeat once more and the gauge will align to the new cell's curve at roughly 3.0V per cell at cutoff.