EB-BA800ABE Samsung Galaxy A8 Replacement Battery 3.8V 3050mAh

Samsung Galaxy A8 SM-A8000 Series — 3.8V Li-Polymer Replacement Battery (EB-BA800ABE)

This is a 3.8V, 3050mAh lithium-polymer replacement cell for the Samsung Galaxy A8 (SM-A8000), including SM-A800F, SM-A800YZ, and Galaxy A8 Duos variants. It replaces OEM part EB-BA800ABE and matches the original connector, footprint, and BMS communication protocol. Capacity and voltage figures are taken directly from the cell specification — 11.59Wh total.

• SM-A8000 platform fitment: All listed A8 variants share the same battery bay geometry, flex connector pinout, and fuel gauge IC interface. One cell specification covers the full SM-A800 lineup without modification to the connector or BMS handshake logic.
• Bench tested on actual hardware: We ran this cell through charge termination on an SM-A800F unit. The BMS accepted the charge IC handshake, terminated cleanly at 4.35V, and did not trigger protection cutoff during a controlled discharge sweep through the modem-active load profile.
• Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. The A8's fuel gauge IC uses a coulomb counter calibrated to the previous cell's discharge curve. Skipping this step causes the reported percentage to drift against the new cell's actual state of charge.

Sudden shutdown at 20–30% on the SM-A8000 after a cell swap

This is a voltage cliff failure, not a capacity problem. The A8's Exynos SoC and modem draw a combined current spike under LTE load that a partially calibrated or aged cell cannot sustain without the terminal voltage collapsing below the BMS cutoff threshold — even when the fuel gauge still reads 25%. The BMS trips the cell before the OS can react, causing a hard shutdown. After fitting the replacement, run one full discharge cycle with mobile data active so the coulomb counter maps the new cell's voltage-versus-capacity curve accurately. The shutdowns typically stop once the fuel gauge IC has completed that first calibration pass.

Phone shows incorrect battery percentage after replacing EB-BA800ABE

The Galaxy A8 stores learned discharge data in the fuel gauge IC — not in the battery itself. When a new cell is installed, that stored curve no longer matches the new cell's actual electrochemistry, so the reported percentage can jump, stall, or read 100% when the cell is not fully charged. The fix is a single full discharge down to automatic shutdown, followed by a full charge to 4.35V with fast charging off. Once that cycle completes, the coulomb counter resets its reference and percentage readings stabilise against the new cell.