About this replacement
Samsung Galaxy Tab A 9.7 — 3.8V Li-Polymer Replacement Battery (EB-BT550ABA)
This is a 3.8V, 6000mAh Li-Polymer battery for the Samsung Galaxy Tab A 9.7 tablet. It fits the SM-T550, SM-P550, and SM-P555, along with six additional variants in the same lineup. Swap it in when the original cell no longer holds a charge or the tablet stops powering on away from the wall.
- SM-T550 and SM-P550 / SM-P555 compatibility: These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The EB-BT550ABA and EB-BT550ABE part numbers are interchangeable across the full Tab A 9.7 range — Samsung used both OEM references for the same cell.
- Bench tested on actual hardware: We ran this cell on an SM-T550 and monitored the charge IC through a full cycle. The BMS accepted the charge handshake without fault flags, and voltage stabilised at 3.8V nominal with no thermal events under display-plus-WiFi load.
- Post-install calibration on the Tab A 9.7: After fitting this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. The Tab A 9.7's fuel gauge IC was calibrated to the old cell — skipping this step causes the percentage readout to jump or stall at incorrect values.
Tablet shutting down at 15–25% remaining after battery swap
The Tab A 9.7 draws hardest when the display brightness is high and WiFi is actively syncing. At around 15–25% state of charge, a new uncalibrated cell can hit a voltage cliff that the fuel gauge misreads as a safe level. The charge controller triggers an emergency shutoff before the displayed percentage reaches zero. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% resets the fuel gauge against the new cell's actual voltage curve.
Fast charging unavailable on the Tab A 9.7 after battery replacement
Adaptive fast charge on the Tab A 9.7 requires the charge IC to complete one accepted full charge cycle before it enables higher-rate negotiation with the charger. A freshly installed cell starts this process from scratch — the protocol won't engage on the first charge. Use the original Samsung charger, not a third-party adapter, and allow the first cycle to complete fully. After that cycle, fast charge availability returns to normal.