Dell Alienware M15 R3 Replacement Battery 11.4V 7000mAh 69KF2

Dell Alienware M15 R3 — 11.4V Li-Polymer Replacement Battery (69KF2)

This 11.4V 7000mAh (79.8Wh) lithium-polymer cell replaces the original 69KF2 battery in the Alienware M15 R3 and M17 R3 series. It fits the P87F and P45E chassis variants and covers OEM part numbers 70N2F and M59JH. Swap it in when the original pack no longer holds a usable charge or fails BIOS health checks entirely.

• M15 R3 and M17 R3 compatibility: Both chassis share the same 11.4V three-cell architecture, identical connector pinout, and the same BMS handshake protocol with the Alienware EC firmware — which is why one part number covers both platforms.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on an M15 R3 board. The BMS negotiated correctly with the EC, charge current stepped down properly at the 80% threshold, and no fault codes triggered during load testing under sustained CPU and GPU draw.
• Post-install discharge cycle on Alienware: After fitting this battery, let the laptop discharge fully to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the EC throws after every cell replacement.

BIOS reporting poor battery health immediately after replacement

The Alienware EC reads EEPROM data written by the original cell and flags a mismatch when a new pack installs. The health percentage shown in BIOS and Dell Power Manager reflects the old cell's wear data, not the new cell's actual condition. This is not a fault with the replacement — it resolves after one full learn cycle. Discharge to hibernate cutoff, charge to 100% without interruption, and the EC rewrites its health baseline against the new cell.

Laptop cuts out at 20–30% charge shown on screen

Under combined CPU and GPU load the M15 R3 draws peak current that older or degraded cells cannot sustain — cell voltage collapses faster than the fuel gauge IC tracks, triggering an abrupt shutdown while the OS still shows charge remaining. A fresh cell with full capacity handles the current draw and holds voltage above the EC's cutoff threshold throughout the discharge curve. After installing, run two to three full discharge-to-charge cycles so the fuel gauge IC calibrates its model against the new cell's actual voltage curve. If shutdowns persist past three cycles, confirm in Dell Power Manager that the reported Wh is reading 79.8Wh, not a legacy value carried from the old EEPROM.