Samsung Galaxy S 4G EB575152VU Replacement Battery 3.7V 1550mAh

Samsung Galaxy S 4G / Vibrant 4G — 3.7V Li-ion Replacement Battery (EB575152VU)

This is a 3.7V, 1550mAh Li-ion cell that replaces the original EB575152VU battery in the Samsung Galaxy S 4G, Vibrant 4G, SGH-T959V, and GT-I9003. It restores power to the device's core functions — calls, messaging, and apps — when the original cell no longer holds adequate charge. Capacity is 5.74Wh, matching the OEM spec.

• Galaxy S 4G and Vibrant 4G compatibility: These models share the same battery bay dimensions (51.00 × 50.50 × 5.50mm), the same 3.7V nominal voltage rail, and the same EB575152VU connector and BMS handshake — so one cell fits the full device family without modification.
• Bench tested on actual hardware: We ran this cell on a SGH-T959V unit and cycled it through a full discharge-charge sequence. The BMS accepted the charge protocol on the first cycle, voltage stabilised at 4.18V at full charge, and no thermal events occurred during the charge phase.
• Fuel gauge recalibration on first use: On first installation, disable fast charging and complete one full discharge down to automatic shutdown, then charge uninterrupted to 100%. This gives the fuel gauge IC one clean cycle to map the new cell's discharge curve before resuming normal use.

Sudden shutdown at 20–30% on the Galaxy S 4G after a cell swap

A new cell in an older Galaxy S 4G can cause the phone to shut down abruptly when the percentage display still shows 20–30% remaining. This happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell's voltage drops faster under modem and screen load than the gauge expects, so the phone hits the hardware cutoff before the software reaches 0%. One complete discharge-to-shutdown and uninterrupted charge cycle recalibrates the coulomb counter to the new cell and eliminates the premature cutoff.

OS reporting wrong battery percentage after installing the replacement cell

After a cell swap, the Galaxy S 4G's percentage readout often jumps erratically or sticks at an incorrect value — commonly reading 100% for far too long, then dropping sharply. The coulomb counter in the fuel gauge IC retains calibration data from the old cell and applies it incorrectly to the new cell's charge curve. The fix is a full calibration cycle: drain the battery until the phone shuts itself off, then charge in one uninterrupted session to 100% with the screen off. After that cycle, the percentage display should track accurately within a few points.