About this replacement
Samsung Galaxy Note 8.0 GT-N5100 — 3.7V Li-Polymer Replacement Battery (SP3770E1H)
This is a 3.7V, 3000mAh (11.1Wh) Li-Polymer battery for the Samsung Galaxy Note 8.0 tablet. It fits the GT-N5100, GT-N5110, and Galaxy Note 8.0 32GB variants. If your original SP3770E1H has swollen, dropped capacity, or stopped holding a charge, this is the direct OEM part number match.
- GT-N5100 and GT-N5110 compatibility: Both variants share the same 3.7V power rail, connector pinout, and BMS handshake protocol — the same SP3770E1H cell fits both without modification. Swapping between these models is not supported; the battery is specific to this Note 8.0 platform.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a GT-N5100 unit. The BMS accepted the cell cleanly, thermal limits held within spec, and voltage under combined display and Wi-Fi load stayed stable without dipping below the cutoff threshold.
- Post-installation fuel gauge reset: After fitting this battery, run the tablet down to automatic shutoff — do not force it off — then charge uninterrupted to 100%. This recalibrates the fuel gauge IC against the new cell and clears the inaccurate percentage reading that typically appears right after a swap.
Galaxy Note 8.0 shutting down at 15–25% remaining
The GT-N5100 draws hard from the battery when the display runs at full brightness alongside active Wi-Fi or data sync. At around 15–25% state of charge, the cell voltage drops quickly under that combined load. The BMS reads this voltage cliff as a critically low cell and triggers an immediate shutdown before the reported percentage reaches zero. Running the full discharge-to-shutoff recalibration cycle after installation brings the fuel gauge back into alignment with actual cell voltage and eliminates most of these premature cutoffs.
Fast charging unavailable after battery replacement on Note 8.0
Some GT-N5100 units show standard charge speed only — not fast charge — after a battery swap. The charge IC needs one completed accepted charge cycle before it re-negotiates the correct charging profile with a new cell. Plug the tablet into the original Samsung charger, let it complete a full uninterrupted charge to 100%, and confirm the charge current on the next cycle. If fast charge remains absent after two full cycles, check that the charger output matches Samsung's spec of 5V/2A for this tablet.