Samsung EB575152VU Replacement Battery 3.7V 2400mAh

Samsung SPH-D700 Epic 4G — 3.7V Li-ion Replacement Battery (EB575152VU)

This is a 3.7V, 2400mAh Li-ion replacement battery for the Samsung SPH-D700, also sold as the Epic 4G. It slots into the original battery bay using the same connector and cell format as the factory unit. Voltage and capacity match the stock specification exactly.

• SPH-D700 and Epic 4G compatibility: Both names refer to the same hardware platform — Sprint's variant of the Galaxy S. They share an identical battery bay, connector pitch, and BMS handshake protocol, so one cell covers both.
• Bench tested on actual hardware: We cycled this cell on the SPH-D700 and confirmed the BMS accepted charge handshake without error flags. Charge termination triggered correctly at full voltage. No false low-battery cutoff appeared during the discharge run.
• Fuel gauge recalibration on first install: On first use, disable any power-saving fast-charge workaround and run one full discharge-to-charge cycle without interruption. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before the phone begins trusting the percentage readout.

Sudden shutdown at 20–30% on the SPH-D700 after a cell swap

The SPH-D700's fuel gauge IC retains the discharge curve from the old, degraded cell. When a fresh cell is installed, the IC underestimates how much voltage headroom remains at mid-charge states. Under modem or screen load, it reads a steeper voltage drop than the new cell actually has and triggers an early shutdown. One complete uninterrupted discharge-charge cycle forces the coulomb counter to rebuild its reference curve against the new cell. After that cycle, shutdowns below 20% should stop.

SPH-D700 not powering on after the replacement battery sat in storage

Li-ion cells self-discharge during storage. If this battery sat below approximately 2.5V per cell before installation, the BMS will lock out charge current as a protection measure — the phone shows nothing when connected to a charger. Connect the phone to a wall adapter, not a PC USB port, and leave it untouched for 15–20 minutes. Wall adapters can push a trickle pre-charge that slowly lifts cell voltage back above the BMS re-enable threshold, usually around 2.9V, at which point the charge IC takes over normally.