MaxBook Y11 H1M6 Replacement Battery 7.6V 3300mAh

MaxBook Y11 H1M6 — 7.6V Li-Polymer Replacement Battery (2666144)

This 7.6V, 3300mAh (25.08Wh) lithium-polymer battery replaces the original cell in the MaxBook Y11 H1M6 notebook. It matches the OEM voltage rail, connector, and physical footprint at 179.00 x 153.16 x 3.00mm. When the stock cell no longer holds charge through a normal work session, this is the direct swap.

• Y11 H1M6 fitment: The H1M6 uses a slim 3.00mm Li-Polymer cell with a specific flex connector pinout and BMS handshake tied to the laptop's EC firmware. This cell matches that pinout and voltage profile, so the EC recognises it on first boot rather than flagging an unknown device.
• Bench tested on actual hardware: We ran charge and discharge cycles on the H1M6 platform and confirmed the BMS accepted the cell, reported state-of-charge correctly after calibration, and did not trigger overcurrent cutoff at normal CPU and display load.
• First-use calibration on the Y11 H1M6: After installing, 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 platform.

BIOS reporting battery health as poor immediately after swap

The Y11 H1M6 BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell's reported state. A freshly installed cell has no charge history logged, so the BIOS flags it as degraded before the learn cycle runs. This is not a fault with the replacement cell. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% — that single calibration cycle writes new baseline data to the EC and the health warning clears.

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

This happens when the fuel gauge IC has calibrated its low-battery threshold against the old, degraded cell. The new cell hits a voltage cliff under combined CPU and display load at a different state-of-charge than the old one did, so the laptop cuts power before the gauge reaches zero. The fix is the same calibration cycle: drain to hibernate-cutoff, then charge fully. After two or three cycles the gauge IC maps the new cell's actual voltage curve and the early shutdowns stop. If the problem persists past three cycles, check that the BIOS is not capping discharge at a firmware-set floor — look under Power Management in BIOS setup.