About this replacement
Dell Alienware 15 R1 / 17 R3 — 14.8V Li-ion Replacement Battery (191YN)
This is a 14.8V 6200mAh (91.76Wh) Li-ion battery for the Dell Alienware 15 R1 and compatible Alienware models. It replaces OEM part numbers 191YN, 2F3W1, and 410GJ. The battery slots into the underside bay and connects via the original multi-pin harness without modification.
- Alienware 15 and 17 series compatibility: The R1, R2, and R3 chassis across these two lines share the same 14.8V power rail, connector pinout, and BMS handshake protocol. One cell fits all of them without adapter or firmware change.
- Bench tested on actual hardware: We ran this cell through a full charge and load cycle on an Alienware 15 R1. The BMS completed handshake on first boot, reported correct voltage to the EC, and held charge without dropout under sustained CPU and GPU load.
- Post-install discharge cycle on Alienware: After fitting this battery, run the system down to hibernate cutoff under normal use, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the false poor-health flag that appears after any cell swap on Alienware and Dell gaming notebooks.
BIOS reporting battery health as poor immediately after installation
Dell's Embedded Controller reads health data from the battery's EEPROM on first boot. The old cell's wear history sits in that EEPROM, and the EC flags the new cell as degraded before it has run a single cycle. This is a firmware state issue, not a fault with the replacement cell. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% — the learn cycle overwrites the stale EEPROM baseline and the health warning clears.
Alienware 15 shutting down at 20–30% charge shown on screen
Under full gaming load — CPU boost plus discrete GPU plus backlit display — the system draws enough current to collapse cell voltage faster than the fuel gauge IC can track. When cell voltage drops below roughly 13.2V under that load, the EC triggers an emergency cutoff even though the gauge still shows 20–30% remaining. The gauge was calibrated against the old degraded cell and is now reading the new cell's discharge curve incorrectly. Two full discharge-to-hibernate and recharge cycles re-sync the fuel gauge IC to the new cell's actual voltage profile and the premature shutdown stops.