About this replacement
Dell Latitude 14 5400 / 5500 — 7.6V Li-ion Replacement Battery (4GVMP)
This 7.6V, 8400mAh (63.84Wh) Li-ion battery replaces the original cell in the Dell Latitude 14 5400, Latitude 14 5500, and Precision 3540. It matches the OEM voltage rail and connector pinout for a direct swap. Capacity figures come from the product data — not estimated or rounded.
- Latitude 5400 / 5500 and Precision 3540 platform: These three models share the same 7.6V two-cell architecture, connector footprint, and BMS handshake protocol — which is why one battery covers all of them. The EEPROM data embedded in the cell communicates directly with the Dell EC firmware to report state-of-charge and health.
- Bench tested on actual hardware: We ran this cell in a Latitude 5400 chassis and confirmed the BMS handshake completes on first boot. The EC accepted the battery without throwing an unknown-device flag, and charge negotiation initiated normally from cold.
- Post-swap calibration on Dell firmware: After installing, run one full discharge to hibernate-cutoff, 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 Dell Latitude hardware.
BIOS reporting battery health as poor after replacement
Dell's EC firmware reads health data from the EEPROM written to the original cell at the factory. When a new cell arrives, the EEPROM cycle count and wear data don't match the charge history the EC expects. The system flags this as degraded health — even on a brand-new battery. Running a full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS learn cycle to rewrite its reference table against the new cell's actual chemistry.
Laptop shutting down at 20–30% remaining after battery swap
This is a voltage-cliff failure, not a capacity problem. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC can recalculate — the system hits the low-voltage cutoff before the displayed percentage reaches zero. The fuel gauge IC hasn't calibrated its discharge curve against the new cell yet. Run two full discharge-to-cutoff cycles and the shutdowns will move progressively closer to 0% as the IC learns the actual voltage curve. Target a resting voltage of 8.4V after a full charge to confirm the cell is healthy.