About this replacement
Dell Chromebook 13 7310 — 11.4V Li-Polymer Replacement Battery (092YR1)
This is an 11.4V, 5700mAh (64.98Wh) lithium-polymer battery for the Dell Chromebook 13 7310. It replaces OEM part numbers 092YR1, 0MJFM6, 0X3PH0, MJFM6, X3PH0, and X3PHO. Fit the correct part number before ordering — the 7310 is the only Chromebook 13 variant this cell matches.
- Chromebook 13 7310 fitment: The 7310 uses a specific three-cell Li-Polymer pack with a dedicated BMS handshake tied to Dell's EC firmware. This cell matches the connector pinout, voltage rails, and pack dimensions (301.90 × 128.80 × 7.56mm) the 7310 expects on boot.
- Bench tested on actual hardware: We cycled this cell through charge, discharge, and idle states on a 7310 unit. The BMS negotiated correctly with Dell's EC on first connection — no charge inhibit, no unknown battery flag on initial power-on.
- Post-install calibration on the 7310: After fitting, run one full discharge to 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 on this model.
BIOS reporting battery health as poor immediately after replacement
The 7310's BIOS reads health data from EEPROM embedded in the battery pack — not from live cell measurements. When a new cell arrives, the EEPROM holds factory baseline data that doesn't match the BIOS's stored history for the old pack. Dell's firmware flags this mismatch as "poor health" or "consider replacing." Running the battery learn cycle — full discharge to hibernate, then uninterrupted full charge — writes new baseline data and clears the flag.
Chromebook 13 7310 shutting down at 20–30% charge shown on screen
This is a voltage cliff symptom, not a calibration error. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC predicts — the system hits the low-voltage cutoff while the OS still shows charge remaining. The fuel gauge IC needs two or three full calibration cycles against the new cell before its predictions track actual voltage accurately. Run full discharges to hibernate cutoff until the shutdown point drops below 10%.