Dell Latitude E7450 Replacement Battery 7.4V 6300mAh 3RNFD

Dell Latitude E7450 / E7250 / E7440 — 7.4V Li-ion Replacement Battery (3RNFD)

This is a 7.4V, 6300mAh (46.62Wh) lithium-ion replacement battery for the Dell Latitude E7450, E7250, and E7440 ultrabook laptops. It replaces OEM part numbers 3RNFD, G95J5, V8XN3, and FLP22C01. The battery connects via the original multi-pin connector and communicates with the Dell BIOS over SMBus.

• E7250, E7440, and E7450 shared platform: These three Latitude models run on Dell's Broadwell-era ultrabook platform and share the same 7.4V battery rail, SMBus BMS communication protocol, and physical connector pinout — which is why one cell fits all three chassis without modification.
• Bench tested on actual hardware: We cycled this cell on an E7450 under combined CPU and display load. The BMS held voltage above the 6.0V cutoff through full discharge and communicated charge state accurately to the BIOS throughout.
• First-cycle calibration after install: After fitting, run the laptop on battery until it hibernates at low charge, then charge uninterrupted to 100%. This triggers the BIOS battery learn cycle, resets the fuel gauge IC against the new cell's actual capacity, and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting poor battery health immediately after replacement

The Dell BIOS reads health data from the battery's EEPROM, which stores cycle count, rated capacity, and charge history. A new cell carries its own EEPROM values, which may differ from what the BIOS cached from the old battery. This mismatch triggers the "Battery has reached end of useful life" or "Consider replacing" warning even on a brand-new cell. Run one full discharge-to-hibernate cycle followed by a full uninterrupted charge to 100%. After one or two learn cycles, the BIOS recalibrates against the new EEPROM data and clears the warning.

Laptop shuts down at 20–30% charge shown on screen

This is a voltage cliff, not a fuel gauge error. Under combined CPU boost and display load, the cell's actual terminal voltage drops faster than the fuel gauge IC predicts — and the BMS cuts power before the displayed percentage reaches zero. It happens most often in the first few cycles before the fuel gauge IC has mapped the new cell's discharge curve. Run two full discharge-to-hibernate cycles with the screen at full brightness and a CPU load active. After calibration, the fuel gauge tracks the voltage curve accurately and the early shutdown stops. If it persists beyond three cycles, check that the replacement matches the 7.4V nominal — a 7.2V cell will hit cutoff earlier under the same load.