Verizon SCH-i535 Galaxy S3 Replacement Battery 3.7V 1400mAh

Verizon SCH-i535 (Galaxy S III) — 3.7V Li-ion Replacement Battery

This is a 3.7V, 1400mAh Li-ion battery for the Verizon SCH-i535, also sold as the Samsung Galaxy S III on Verizon's network. It fits the SCH-i535, SCHI535ZKB, Galaxy S3, and Galaxy SIII handsets. Voltage and connector match the original cell exactly.

• SCH-i535 and SCHI535ZKB compatibility: Both variants share the same 3.7V battery bay, connector pinout, and BMS handshake protocol. Swapping between these model numbers does not require any hardware modification.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the SCH-i535 platform. The BMS accepted charge from the stock charger without fault flags, and the protection circuit tripped correctly at low-voltage cutoff.
• Fuel gauge recalibration on first use: On first installation, disable fast charging if available and run one complete discharge-to-charge cycle before normal use. This allows the fuel gauge IC to map its coulomb counter against the new cell's actual discharge curve before high-current charging begins.

Sudden shutdown at 20–30% on the SCH-i535 after a cell swap

This is a voltage cliff issue, not a capacity problem. The Galaxy S III's modem radio and display draw enough current to cause a new cell's terminal voltage to sag sharply under load — faster than the fuel gauge IC expects based on the old cell's curve. The phone reads 25% but the actual cell voltage drops below the shutdown threshold under that load spike. One full discharge-charge cycle lets the coulomb counter relearn the new cell's voltage-to-capacity curve and the shutdowns stop.

OS reporting wrong battery percentage after replacement

The fuel gauge IC on the SCH-i535 stores a learned discharge curve from the original cell. A new cell has a different internal resistance profile, so the IC's percentage estimate drifts — often reading full when the cell is at 80%, or jumping erratically between values. The fix is straightforward: drain the phone until it shuts off automatically, then charge uninterrupted to 100% without removing the charger. After that single cycle, the coulomb counter recalibrates to the new cell and percentage reporting stabilises. Confirm the phone reaches 4.2V at full charge before treating the calibration as complete.