About this replacement
Samsung Galaxy A25 / A25 5G — 3.88V Li-Polymer Replacement Battery (EB-BA256ABS)
This is a 5000mAh, 3.88V Li-Polymer cell built to the EB-BA256ABS specification. It fits the Samsung Galaxy A25 and Galaxy A25 5G, including variants SM-A256U and SM-A256U1/DS. Capacity figure is taken directly from the product specification — 19.4Wh total energy.
- Galaxy A25 and A25 5G platform fit: Both the standard A25 and the 5G variant share the same battery bay dimensions, connector pinout, and BMS handshake protocol — the EB-BA256ABS cell works across all SM-A256 sub-variants without modification.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on an SM-A256U unit. The BMS accepted the handshake cleanly, charge IC ramped to full current without fault codes, and the protection circuit triggered correctly at the low-voltage cutoff threshold.
- Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging is applied to an uncalibrated cell.
Sudden shutdown at 20–30% on the Galaxy A25 after a cell swap
This is a voltage cliff issue, not a capacity problem. The Galaxy A25 runs a modem and an AMOLED panel simultaneously — both draw sharp current spikes. If the fuel gauge IC is still calibrated to the old cell's internal resistance curve, it misreads state-of-charge. The new cell drops below the system's minimum voltage rail under load before the OS registers low battery. Run one full discharge to automatic shutdown, then charge uninterrupted to 100% to force the coulomb counter to reset against the new cell's actual curve.
USB fast charge not activating after battery replacement on the A25
On the first cycle after installation, the charge IC may not negotiate the fast-charge protocol until the BMS has completed one full handshake sequence with the new cell. This is normal behaviour — the phone defaults to standard 5V charging as a safety fallback. Disconnect the cable, power the phone off fully, then reconnect to a compatible 25W charger. If the fast-charge icon still does not appear, complete one full discharge cycle first; the BMS typically accepts the protocol without issue from the second charge onward.