Samsung Galaxy Tab 4 Replacement Battery T4450E 3.8V 3000mAh

Samsung Galaxy Tab 4 Series — 3.8V Li-Polymer Replacement Battery (T4450E)

This 3.8V, 3000mAh (11.4Wh) lithium-polymer battery replaces part number T4450E and T4450C in the Samsung Galaxy Tab 4 line. It fits the SM-T337V, Galaxy Tab 4 8.0 LTE, and Millet variants, among others. If your tablet won't hold charge or shuts down unexpectedly, this is a direct cell-level replacement.

• Galaxy Tab 4 variant compatibility: The SM-T330, SM-T331, SM-T335, and SM-T337V series all draw from the same 3.8V power rail and use the same connector pinout and BMS handshake protocol — which is why T4450E and T4450C cover the whole family without modification.
• Bench tested on actual hardware: We ran this cell on a SM-T331 unit. The BMS accepted the new cell without fault codes, charge current ramped correctly from trickle to CC phase, and CV termination cut off cleanly at 4.35V.
• Fuel gauge recalibration after install: After fitting this battery, run the tablet down to automatic shutoff — do not force it off — then charge uninterrupted to 100%. This single full cycle resets the fuel gauge IC against the new cell's actual capacity curve and clears the skewed percentage reading that almost always appears after a swap.

Galaxy Tab 4 shutting down at 15–25% remaining

This happens because the fuel gauge IC was calibrated to the old, degraded cell. When the curve shifts, the chip misreads remaining capacity and signals a low-voltage shutdown too early. The combined load of the display backlight plus active WiFi pulls enough current to cause a real voltage sag at that state of charge — the BMS trips before the percentage hits zero. Run one full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% and the symptom clears in most cases. If it persists past two cycles, check that the connector is fully seated — a loose fit creates resistance that amplifies the sag at high draw.

Fast charging not available after battery swap on Galaxy Tab 4

Samsung's adaptive fast charge protocol requires a successful completed charge cycle before the charger and device negotiate higher current delivery. On a freshly installed cell, the charge IC defaults to standard 5V/1A until it has one accepted full cycle on record. Use the original Samsung charger — third-party adapters often don't send the correct voltage handshake for AFC negotiation. After one full charge to 100% with the OEM adapter, fast charge availability returns on subsequent sessions.