EB575152VU Captivate Compatible Battery 3.7V 1250mAh Li-ion

AT&T Captivate / Galaxy S SGH-i897 — 3.7V Li-ion Replacement Battery (EB575152VU)

This is a 3.7V, 1250mAh Li-ion cell for the AT&T Captivate, Epic 4G, SGH-i897, and Galaxy S. It fits the removable battery bay directly and matches the OEM connector and contact layout. Voltage and capacity match the EB575152VU, EB575152VA, and EB575152LA part numbers.

• Captivate, Epic 4G, and SGH-i897 shared platform: These devices all run on Samsung's Hummingbird SoC platform and share the same battery form factor, contact pitch, and 3.7V nominal rail — one cell fits all three without modification.
• Bench tested on actual hardware: We cycled this cell on the SGH-i897 and monitored BMS cutoff behaviour under screen-on load. The protection circuit held discharge cutoff at 3.0V and accepted charge current without tripping the over-voltage threshold.
• Fuel gauge recalibration after install: After fitting this cell, run one full discharge to auto-shutoff followed by a full uninterrupted charge before using the phone normally. The Captivate's fuel gauge IC is calibrated to the old cell's discharge curve — skipping this step causes the percentage readout to jump erratically in the first few days.

Sudden shutdown at 20–30% on the Captivate after a cell swap

The Captivate's fuel gauge IC stores a learned discharge curve from the previous cell. When a new cell is installed, the gauge's state-of-charge model no longer matches the actual voltage-versus-capacity curve of the replacement. Under modem or display load, the new cell's terminal voltage drops faster than the gauge predicts, crossing the hardware cutoff threshold while the display still shows 20–30%. One full discharge-to-shutoff cycle followed by a complete recharge lets the coulomb counter reset and re-anchor to the new cell's actual curve.

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

Li-ion cells that discharge below approximately 2.5V during storage trigger a BMS lockout to prevent cell damage — the protection circuit opens and blocks current flow entirely. The Captivate will show no sign of life and won't respond to the charger immediately. Connect the phone to a wall adapter and leave it untouched for 15–30 minutes — the charge IC applies a low pre-charge current that slowly raises cell voltage back above the BMS re-enable threshold. Once the cell reaches roughly 3.0V, the BMS closes and normal charging resumes.