Ez812 OK OMP 100 Smartphone Replacement Battery 3.7V 1050mAh

OK OMP 100 / OMP 110 — 3.7V Li-ion Replacement Battery (Ez812)

This is a 3.7V 1050mAh (3.89Wh) Li-ion replacement cell for the OK OMP 100 and OMP 110 smartphones. It fits the original battery bay and connects to the same charge IC as the factory Ez812 unit. Swap it in when the original cell no longer holds enough charge to keep the phone running through normal use.

• OMP 100 and OMP 110 compatibility: Both models use the same battery bay dimensions, connector pinout, and charge IC. The Ez812 part number covers both, so one cell fits either handset without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the OMP 100 platform. The BMS accepted the charge IC handshake on the first cycle and held the voltage rail stable under screen-on and modem load without tripping an overcurrent cutoff.
• Fuel gauge recalibration on first use: After fitting the new cell, disable fast charging if your carrier or OS allows it, then run one full discharge down to auto-shutdown followed by a complete charge. This gives the fuel gauge IC a clean reference curve for the new cell's actual capacity before high-current charging begins.

Sudden shutdown at 20–30% on the replacement cell

A new Li-ion cell has a slightly different voltage-versus-capacity curve than the worn cell the fuel gauge IC was calibrated against. When the phone reads 20–30% remaining, the actual cell voltage may already be dropping fast under modem or display load — faster than the IC predicts. The system hits the low-voltage cutoff and shuts down before the displayed percentage reaches zero. One full discharge-to-shutdown followed by a full charge resets the coulomb counter and aligns the IC to the new cell's actual curve. After that cycle, the percentage readings stabilise and the early shutdowns stop.

Phone warm near the battery during the first few charges

A fresh cell starts with higher internal impedance than a broken-in one. The charge IC pushes current into that higher-impedance cell and dissipates more energy as heat in the process. This is normal for the first two or three charge cycles and fades as the cell's impedance settles. If the phone is still noticeably warm after five or more full charges, check that nothing is blocking the rear of the handset during charging — trapped heat can cause the charge IC to throttle back or throw a thermal fault at around 45°C.