Micromax Yureka Compatible Battery 3.7V 2100mAh Li-ion

Micromax Yureka — 3.7V Li-ion Replacement Battery

This 3.7V, 2100mAh Li-ion battery is a direct cell replacement for the Micromax Yureka smartphone. It fits the 2014 mid-range Android handset and restores power capacity when the original cell has degraded or failed. Voltage and capacity match the original specification: 3.7V nominal, 7.77Wh total energy.

• Yureka platform fit: The Yureka uses a removable flat-pack cell with a fixed connector pinout. This replacement matches that physical format, connector position, and voltage rail — the phone's charge IC sees the same input parameters it expects from the factory cell.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Yureka mainboard. The BMS accepted the cell without triggering fault flags, and the charge IC reached full cutoff voltage without interruption.
• Fuel gauge recalibration on first use: On first use after installation, run one complete discharge-to-charge cycle with fast charging disabled. This gives the fuel gauge IC a clean reference curve against the new cell before high-current charging begins on an uncalibrated counter.

Sudden shutdown at 20–30% on the replacement cell

This happens because the fuel gauge IC is still calibrated to the discharge curve of the old, degraded cell. The new cell has a steeper voltage cliff at low state-of-charge, and the phone's modem or screen load pulls enough current to collapse cell voltage below the protection threshold before the percentage reading catches up. The BMS trips and the phone shuts off — even though the gauge still shows charge remaining. One full discharge cycle, run without fast charging, resets the coulomb counter reference and eliminates the early cutoff.

Phone feels warm near the battery compartment on first charge

A fresh cell has higher internal impedance than a broken-in one. The charge IC pushes current into this higher resistance, and the energy that would normally flow into the cell instead dissipates as heat at the cell terminals. This is most pronounced in the first one or two charge cycles and reduces as internal impedance drops with use. If warmth persists beyond the third full charge cycle, check that the replacement cell is seated flat with no gap between the cell body and the battery compartment contacts.