Verizon F450 Replacement Battery Li3710T42P3h 3.7V 900mAh

Verizon F450 / ADAMANT — 3.7V Li-ion Replacement Battery (Li3710T42P3h483757)

This 3.7V, 900mAh Li-ion cell replaces the original battery in the Verizon F450 and ADAMANT smartphones. It matches the OEM part number Li3710T42P3h483757 and sits within the same 47.67 × 37.27 × 5.80mm envelope as the factory cell. Capacity is 3.33Wh — identical to the original spec.

• F450 and ADAMANT compatibility: Both handsets share the same battery bay dimensions, 3.7V nominal rail, and connector pinout, which is why they draw from the same OEM part number. No adapter or wiring change is needed.
• Bench tested on actual hardware: We cycled this cell through a full charge-discharge sequence on an F450 unit and confirmed the BMS accepted the cell without throwing a charging fault. Voltage held steady across the discharge curve with no premature cutoff.
• Fuel gauge recalibration after install: On first use, disable fast charging if available and run one complete discharge-charge cycle. The F450's fuel gauge IC was calibrated against the old cell's discharge curve — giving it one uninterrupted cycle lets it map the new cell accurately before reporting reliable percentages.

Why the F450 reports wrong battery percentage after a cell swap

The F450 uses a fuel gauge IC that tracks charge state by counting coulombs against a stored discharge curve from the original cell. A new cell has a different internal resistance and discharge profile, so the IC's reference data no longer matches reality. The gauge can read 40% while the actual cell voltage is already near cutoff. One full discharge-charge cycle without interruption forces the IC to rebuild its reference curve against the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops below the BMS cutoff threshold under load — typically when the modem radio fires a high-draw burst or the screen peaks — even though the gauge still shows charge remaining. A fresh cell with a slightly different voltage-to-capacity curve hits the BMS floor earlier than the gauge predicts. After the first full calibration cycle, the gauge and BMS cutoff align more closely. If shutdowns continue past two full cycles, check that resting voltage after a full charge reads at least 4.15V.