Dell Studio 17 11.1V 6600mAh Replacement Battery 0W077P

Dell Studio 1745/1747/1749 — 11.1V Li-ion Replacement Battery (0W077P)

This is an 11.1V, 6600mAh Li-ion battery for the Dell Studio 17, Studio 1745, Studio 1747, and Studio 1749 laptops. It replaces OEM part numbers including 0W077P, M905P, N855P, U150P, and Y067P. Slot it in and the notebook runs on battery power again — no AC adapter required for everyday use.

• Studio 17 series fit: The 1745, 1747, and 1749 share the same battery bay geometry, connector pinout, and BMS handshake protocol — all three accept this cell without modification or adapter.
• Bench tested on actual hardware: We ran this cell on a Studio 1747 and confirmed the BMS initialised correctly, the BIOS recognised the battery as a valid Dell cell, and charge current ramped normally through CC and CV phases without tripping a fault.
• First-cycle reset after install: After fitting the new cell, run one full discharge down to the hibernate cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the inaccurate health warning that appears after every cell swap.

Why the Studio 17 BIOS flags a new battery as poor health immediately after swap

The Dell BIOS stores learned capacity data in the battery's EEPROM. When you swap cells, the BIOS reads the new cell's EEPROM and finds no cycle history — it flags this as degraded or unknown health. This is a data mismatch, not a fault with the physical cell. Running one complete discharge-to-hibernate followed by a full uninterrupted charge gives the BIOS enough data to rewrite the health estimate accurately. After one or two full cycles, the health warning clears on its own.

Laptop shuts down at 20–30% charge shown on the gauge

This happens when the fuel gauge IC hasn't calibrated against the new cell yet. The gauge still uses capacity figures mapped to the old, degraded cell — so it reads 25% remaining while the actual cell voltage has already dropped below the BMS cutoff threshold. The laptop cuts out because the BMS sees a real low-voltage condition, even though the OS display says otherwise. Fix it by completing two full discharge-to-100% cycles; the fuel gauge IC recalibrates and the shutdown point shifts back toward the correct 5–8% range, typically around 11.1–11.4V at load.