EB504465YZ Samsung SCH-I400 Replacement Battery 3.7V 1750mAh

Samsung SCH-I400 Continuum — 3.7V Li-ion Replacement Battery (EB504465YZ)

This 3.7V, 1750mAh Li-ion cell replaces the original EB504465YZ battery in the Samsung SCH-I400 Continuum and related models. It also fits the Gem i100 / SCH-i100 and several other Samsung handsets sharing the same connector and voltage rail. Capacity figure is from the product specification — 6.48Wh total energy.

• SCH-I400 Continuum and Gem i100 compatibility: Both handsets run the same 3.7V single-cell architecture with the same physical connector and BMS handshake protocol. One cell covers both platforms without modification.
• Bench tested on actual hardware: We cycled this cell through a full charge-discharge sequence and monitored the BMS cutoff response at both high load and idle draw. Charge acceptance and protection circuit response matched OEM parameters.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging begins on an uncalibrated cell.

Sudden shutdown at 20–30% on the SCH-I400 after a cell swap

The SCH-I400's fuel gauge IC retains the discharge curve data from the old, degraded cell. When the phone predicts 20–30% remaining using that stale curve, the new cell's actual voltage under modem or screen load can drop below the hardware cutoff threshold — triggering an abrupt shutdown. The phone is not faulty and the replacement cell is not defective. Run two full discharge-charge cycles without fast charging and the fuel gauge IC will remap to the new cell's actual capacity.

Phone feels warm near the battery during the first few charges

A new Li-ion cell arrives with higher internal impedance than a broken-in cell. During the first charge cycles, the charge IC works against this higher resistance, which generates moderate heat at the battery compartment. This is normal and diminishes after two or three full cycles as the cell's impedance settles. If warmth persists beyond the third cycle or the phone becomes hot to the touch, check that the replacement cell is seated flush and the contacts are clean — then recheck charge behaviour at 4.2V termination.