Samsung Galaxy Ace 4 EB-BG357BBE Replacement Battery 3.8V 1900mAh

Samsung Galaxy Ace 4 (SM-G357M) — 3.8V Li-ion Replacement Battery (EB-BG357BBE)

This is a 3.8V, 1900mAh Li-ion replacement battery for the Samsung Galaxy Ace 4 and Ace Style LTE series. It fits the SM-G357M, SM-G357FZ, and closely related variants that use the EB-BG357BBE cell. Swap it in when the original cell no longer holds voltage under screen or call load.

• Ace 4 / Ace Style LTE platform fit: The SM-G357 series shares a common battery bay, connector pinout, and BMS handshake across its regional variants. The same cell works across SM-G357M and SM-G357FZ because Samsung kept the charge IC and connector identical across that production run.
• Bench tested on actual hardware: We cycled this cell through the SM-G357M charge IC and confirmed the BMS communicates state-of-charge correctly. The protection circuit tripped at expected low-voltage cutoff and recovered cleanly on reconnection.
• Fuel gauge recalibration on first install: After fitting this cell, run one full discharge down to automatic shutdown, then charge uninterrupted to 100% before re-enabling fast charge. The phone's coulomb counter is still mapped to the old cell's discharge curve — one complete cycle resets it to the new cell's actual capacity.

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

The SM-G357M's fuel gauge IC uses a stored discharge curve to predict remaining capacity. When you install a new cell, that curve no longer matches the new cell's actual voltage profile. Under modem transmission or screen-on load, the phone pulls current that drops cell voltage below what the IC expects at 20–30%, triggering an emergency shutdown. This is not a fault with the replacement cell — it is a calibration mismatch. Run one full discharge-to-shutdown and a complete charge cycle to resync the fuel gauge to the new cell.

Phone not powering on after the replacement battery sat in storage

Li-ion cells self-discharge during storage, and if a cell drops below approximately 2.5V per cell, the BMS locks out to prevent damage from a forced charge into a deeply depleted cell. The SM-G357M will show no response — no boot logo, no charge indicator — when this happens. Connect the phone to a wall charger, not a PC USB port, and leave it for 20–30 minutes without pressing any buttons. Most BMS circuits on this platform will accept a low-current trickle from the charge IC and re-initialise once the cell climbs back above 3.0V.