Dell Latitude 3301 Replacement Battery HK6N5 7.6V 5500mAh

Dell Latitude 3301 / Vostro 5390 — 7.6V Li-Polymer Replacement Battery (HK6N5 / DGV24)

This is a 7.6V, 5500mAh (41.8Wh) Li-Polymer replacement battery for the Dell Latitude 3301, Vostro 5390, Inspiron 13 5390, and Inspiron 13 5000 5390 series, among others. It replaces OEM part numbers HK6N5 and DGV24. These thin-profile laptops use a flat Li-Polymer cell pack to fit within their slim chassis — this unit matches that geometry exactly.

• Latitude 3301, Vostro 5390, and Inspiron 13 5390 compatibility: These models share the same 7.6V dual-cell Li-Polymer architecture, connector pinout, and BMS handshake protocol. A single battery design covers all of them without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Latitude 3301. The BMS communicated correctly with the EC, charge termination triggered at the right cutoff voltage, and no overcurrent faults were logged.
• Post-install calibration on Dell systems: After installing, run the laptop down to hibernate-cutoff on battery alone, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting battery health as poor after replacement

Dell's EC reads health data stored in the old cell's EEPROM and flags the new unit as degraded because the stored cycle count and capacity history don't match the fresh cell. This is a firmware read issue, not a battery fault. Run one full discharge-to-hibernate then a complete uninterrupted charge to 100% — this triggers the learn cycle and rewrites the health registers. After two to three full cycles, the BIOS health indicator will reflect the actual cell state.

Laptop shutting down at 20–30% shown on the gauge after battery swap

The fuel gauge IC calibrates against the previous cell's discharge curve — when a new cell goes in, that curve no longer matches, and the gauge under-reports remaining capacity. Under full CPU and display load, voltage drops faster than the uncalibrated IC expects, triggering an emergency shutdown before the display reads zero. This is not a faulty cell. Run two or three complete discharge-to-hibernate and full-charge cycles to let the fuel gauge IC recalibrate against the new cell's actual voltage curve. After calibration, shutdown should not occur above 5% remaining.