Auro M912 M101 Replacement Battery 3.7V 1000mAh

Auro M101 — 3.7V Li-ion Replacement Battery (M912)

This is a 3.7V, 1000mAh Li-ion cell built to the M912 specification for the Auro M101 smartphone. It replaces the original battery when the cell has degraded and can no longer hold voltage under load. Dimensions are 53.80 × 36.90 × 5.20mm — verify against your existing cell before installing.

• M101 fit confirmation: The M912 part number maps directly to the M101 battery bay. Connector orientation, PCB tab spacing, and cell thickness match the factory cell — no modification needed to seat it correctly.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS accepted the charge profile without error, and protection circuits tripped correctly at the low-voltage cutoff threshold.
• Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.

Sudden shutdown at 20–30% on the replacement cell

This happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. A new cell may hit a voltage cliff earlier than the IC expects, especially under modem or screen load. The phone interprets a voltage drop as a normal reading until the cell can no longer sustain the draw — then it shuts off. One full discharge-charge cycle corrects the curve mapping and stops premature shutdowns.

Phone not powering on after the M912 sat in storage

Li-ion cells stored below roughly 2.5V per cell trigger BMS lockout as a protection measure. The phone will not respond to a normal charger because the BMS blocks current into a deeply discharged cell. Connect to a charger and leave it untouched for 15–30 minutes — the charge IC on most budget Android handsets applies a trickle current to bring the cell above the lockout threshold before switching to standard charge mode. If the screen stays dark past 45 minutes, check the cable and adapter before assuming cell failure.