About this replacement
Samsung Galaxy Tab S9 — 3.88V Li-Polymer Replacement Battery (EB-BX716ABY)
This is a 3.88V, 8150mAh Li-Polymer replacement battery for the Samsung Galaxy Tab S9. It fits the SM-X710, SM-X710N, and SM-X716 model variants. Use it when the original cell no longer holds a charge or the tablet shuts down unexpectedly under normal use.
- SM-X710 and SM-X716 compatibility: Both the Wi-Fi and 5G variants of the Tab S9 use the same battery bay dimensions and connector pinout. The BMS handshake is identical across these SKUs, so one cell covers the full Tab S9 lineup without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the SM-X710 board. The BMS accepted charge current correctly, reported state-of-charge to the OS without fault codes, and held voltage flat across the mid-range draw of the display and processor together.
- Fuel gauge recalibration after swap: After fitting this battery, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without unplugging. The fuel gauge IC calibrates itself against the new cell during this first full cycle — skipping it causes the percentage display to read inaccurately for days.
Tab S9 shutting down at 15–25% remaining after battery replacement
The Galaxy Tab S9 draws hard on the battery when the display is at full brightness and Wi-Fi or 5G is active simultaneously. A fresh cell that hasn't been calibrated has a voltage curve the fuel gauge IC doesn't yet recognise. The IC reads an early voltage cliff and triggers a protective shutdown before the cell is actually empty. One full discharge-to-shutoff followed by an uninterrupted charge to 100% realigns the IC's voltage map to the new cell — after that, the shutdowns stop.
Fast charging not available after battery swap on the Tab S9
The Tab S9 uses USB Power Delivery negotiation to enable fast charge — the charger and tablet exchange capability packets before stepping up current. On a freshly installed cell, the charge IC sometimes holds the session at standard 5V until it completes one accepted charge cycle with the new battery. Plug in the original Samsung charger and let the first cycle complete fully without interruption. After that cycle, USB-PD negotiation resumes normally and the fast charge indicator returns.