About this replacement
Samsung Galaxy Tab S 10.5 — 3.8V Li-Polymer Replacement Battery (GH43-03998A)
This 3.8V, 6600mAh lithium-polymer cell replaces the original battery in the Samsung Galaxy Tab S 10.5 and related models. It fits the SM-P600, SM-P601, Galaxy Note 10.1 2014 Edition, and SM-T520, among others. The OEM part numbers it crosses to include GH43-03998A, T8220E, T8220K, and AA1DA04WS/7-B.
- SM-P600 and SM-P601 fitment: Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The 213.13 × 106.06 × 3.56mm cell slides into either unit without modification, and the charge IC reads the same protection registers on both.
- Bench tested on actual hardware: We ran this cell on an SM-P600 and monitored BMS behaviour through full charge and discharge cycles. Protection circuits tripped correctly at low-voltage cutoff, and the charge IC accepted the cell without error flags on the first cycle.
- Fuel gauge recalibration after swap: After fitting this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. The Galaxy Tab S fuel gauge IC calibrates against the old cell's wear curve — skipping this step leaves the percentage display inaccurate for days.
Tablet shutting down at 15–25% remaining after battery replacement
The SM-P600 combines a 2560×1600 Super AMOLED display with a Wi-Fi radio that can draw over 600mA simultaneously. At the low end of the charge curve, cell voltage drops sharply under that combined load — faster than the fuel gauge predicts. The tablet's protection circuit sees the voltage cliff and forces a cutoff before the reported percentage reaches zero. One full calibration cycle — discharge to shutoff, uninterrupted charge to 100% — resets the fuel gauge threshold and eliminates the premature cutoff.
Fast charging unavailable after fitting a new cell on the Galaxy Tab S 10.5
The Galaxy Tab S 10.5 uses Samsung's Adaptive Fast Charging protocol, which requires a completed charge handshake between the charger and the charge IC before elevated current is allowed. On a fresh cell, the charge IC defaults to standard current until it records one accepted full cycle. Plug the tablet into the original Samsung charger or a certified AFC-compatible adapter and let it complete one full charge from below 20% to 100% without interruption. After that cycle, the fast charge indicator will appear at the lock screen as expected.