Dell Latitude 5330 Replacement Battery 15.2V 3800mAh 8H6WD

Dell Latitude 5330 / 7530 / 7430 / 7330 — 15.2V Li-Polymer Replacement Battery (8H6WD)

This is a 15.2V, 3800mAh (57.76Wh) Li-Polymer battery pack for the Dell Latitude 5330, 7530, 7430, and 7330 series business laptops. It replaces OEM part numbers 8H6WD, 8P81K, FK0VR, and FKOVR. Physical dimensions are 247.60 × 94.65 × 6.00mm — same footprint as the factory cell.

• Latitude 5330 / 7530 / 7430 / 7330 platform fit: These four models share the same 15.2V power rail, connector pinout, and BMS handshake protocol. One cell covers all four because the BIOS battery authentication challenge is identical across this generation of Latitude hardware.
• Bench tested on actual hardware: We ran this cell on a Latitude 7430 and a 5330. The BMS negotiated correctly with the EC on first boot, charge current ramped normally through CC to CV phase, and the BIOS battery status cleared from unknown to normal after one learn cycle.
• First-cycle learn cycle after install: After fitting this cell, discharge the laptop on normal workload until it hibernates at the low-voltage cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the EC raises after every cell swap.

Why the Latitude BIOS reports poor battery health immediately after a cell swap

Dell's embedded controller reads charge cycle count, design capacity, and full-charge capacity from EEPROM data stored on the battery pack itself. A new cell arrives with zeroed or factory-default EEPROM values that do not match what the EC expects after years of logging the old pack. The EC flags this mismatch as degraded health before any actual capacity measurement has occurred. One full discharge-to-hibernate followed by an uninterrupted charge gives the EC enough data to overwrite that stale flag.

Laptop shuts down at 20–30% charge shown after battery replacement

This happens because the fuel gauge IC is still using a charge curve calibrated to the old, degraded cell. When the CPU and display pull peak current together, the new cell's actual voltage briefly dips below what the EC considers safe — even though the displayed percentage reads well above zero. The EC triggers an emergency shutdown to protect the cell, not because capacity is low. Run two full discharge-to-hibernate and full-charge cycles back to back; the fuel gauge IC recalibrates its curve against the new cell chemistry and the shutdowns stop.