Samsung SGH-T759 EB484659VA Replacement Battery 3.7V 1500mAh

Samsung SGH-T759 / Exhibit 4G Series — 3.7V Li-ion Replacement Battery (EB484659VA)

This is a 3.7V, 1500mAh Li-ion cell that replaces the original battery in the Samsung SGH-T759, Exhibit 4G, Gravity Smart, and SGH-T589, among others. It matches the OEM dimensions at 58.60 × 45.94 × 5.00mm and uses the same connector pinout as the factory cell. Voltage and capacity are drawn directly from the product specification — 5.55Wh total energy.

• SGH-T759 / Exhibit 4G platform fit: These models share the same battery bay geometry, 3.7V nominal voltage rail, and three-pin connector with integrated NTC thermistor line. The charge IC in each device reads the same thermistor response, so no BMS handshake is required beyond a standard Li-ion charge profile.
• Bench tested on actual hardware: We cycled this cell through full charge and load discharge on the SGH-T759 platform. The charge IC accepted the cell immediately, thermistor readings stayed within spec, and the BMS did not trigger a lockout at either end of the voltage range.
• Fuel gauge recalibration on first use: On the first install, disable fast charging if your carrier or ROM supports it, then run one complete discharge-to-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before any high-current session skews the baseline reading.

Why the SGH-T759 shuts down suddenly at 20–30% after a cell swap

The phone's fuel gauge IC retains the discharge curve it learned from the old, degraded cell. When load spikes — modem TX bursts or screen-on events — the new cell briefly sags in voltage at a point the IC still maps as 20–30% remaining. The hardware voltage floor trips a hard shutdown before the IC can correct itself. One full manual discharge cycle, letting the phone reach the OS low-battery warning and then charging uninterrupted to 100%, resets the learned curve and eliminates most premature shutoffs.

Phone won't power on after the replacement battery sat in storage

Li-ion cells self-discharge roughly 2–3% per month in storage. If this cell sat long enough to drop below 2.5V per cell, the BMS enters a lockout state to prevent damage and will not respond to a normal power-on attempt. Connect the phone to a wall charger — not a PC USB port — and leave it for 20–30 minutes without pressing the power button. The charge IC will trickle-charge the cell back above the BMS re-enable threshold, typically around 2.8–3.0V, after which a normal boot will succeed.