About this replacement
Dell Precision 5680 / 5690 — 11.55V Li-Polymer Replacement Battery (6D2HW)
This is an 11.55V, 8600mAh (99.33Wh) lithium-polymer replacement battery for the Dell Precision 5680 and Precision 5690 mobile workstations. It slots into the internal bay and restores portable operation when the original cell has degraded or failed. OEM cross-references include 6D2HW, KV690, N7KV9, and WPYCV.
- Precision 5680 and 5690 compatibility: Both models run the same 11.55V battery rail with an identical physical connector and BMS handshake protocol. One cell covers both platforms without modification.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Precision 5680 chassis. The BMS negotiated correctly with the EC firmware — no error flags, no charge interruption, and the fuel gauge IC initialized without a manual reset.
- Post-install calibration on the Precision 5680: After fitting, run one full discharge to the 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.
BIOS reporting poor battery health after installing a new cell
Dell's BIOS reads health data stored in the battery's EEPROM. When a new cell ships, that EEPROM contains factory defaults that don't match the host system's learned charge history. The EC interprets the mismatch as a degraded or unknown battery. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS learn cycle to rewrite against the new cell's actual data. After two to three cycles, the health status in Dell Power Manager corrects itself.
Precision 5680 shutting down abruptly at 20–30% charge shown
This happens when the cell voltage drops below a sustainable threshold under combined CPU and display load — faster than the fuel gauge IC can track. The gauge was calibrated against the old, degraded cell and has not yet learned the new cell's discharge curve. The system hits the EC's undervoltage cutoff while the OS gauge still shows charge remaining. Run two full calibration cycles — discharge to hibernate cutoff, then charge to 100% without interruption — and the gauge IC recalibrates to the new cell's voltage profile.