Samsung SGH-T759 Replacement Battery EB484659VA 3.7V 1200mAh

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

This is a 3.7V, 1200mAh Li-ion battery that replaces part number EB484659VA in the Samsung SGH-T759, Exhibit 4G, Gravity Smart, SGH-T589, and over 49 additional Samsung handsets. It slots directly into the battery bay and connects to the same three-contact terminal used across this handset family. Dimensions are 58.80 × 45.50 × 5.20mm — confirm against your original cell before ordering.

• SGH-T759 / Exhibit 4G family fit: Samsung used the same voltage rail, connector pitch, and BMS handshake across the T759, T589, Gravity Smart, and related variants. One cell covers the group because the charge IC and thermal pin layout are shared across this platform generation.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the SGH-T759 platform. The BMS accepted the handshake on first connection, charge current ramped normally through CC/CV stages, and the thermal cutoff tripped correctly at the expected threshold under load.
• Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging and run one full discharge down to auto-shutdown, then charge uninterrupted to 100%. This gives the phone's fuel gauge IC one complete cycle to map the new cell's discharge curve before reporting accurate percentages.

Why the SGH-T759 reports wrong battery percentage after a cell swap

Samsung's fuel gauge IC on this platform uses a coulomb counter that was calibrated to the original cell's internal resistance and discharge curve. When you install a new cell, the counter still references the old curve, so it reads voltage offsets incorrectly and shows inaccurate percentages. The fix is a single full discharge-charge cycle with the screen on and no fast charge. After that cycle, the IC anchors its empty and full voltage reference points to the new cell and reports correctly from then on.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or screen pulls a brief high-current spike and the cell voltage dips below the BMS cutoff threshold — even though the gauge still shows charge remaining. A fresh cell with an uncalibrated fuel gauge is most vulnerable in that 20–35% window where reported SOC and actual cell voltage diverge the most. Run the full recalibration cycle described above and the shutdowns stop in most cases. If they continue after two full cycles, check that resting cell voltage reads at least 3.6V with a multimeter before reinstalling.