Samsung Galaxy Z Fold3 Replacement Battery 3.88V 2200mAh

Samsung Galaxy Z Fold3 Series — 3.88V Li-Polymer Replacement Battery (SM-F9260 / SM-W2022)

This 3.88V, 2200mAh Li-Polymer cell replaces the original battery in the Samsung Galaxy Z Fold3, Galaxy Z Fold 3 5G, SM-F9260, SM-W2022, and compatible variants. It is a direct cell replacement for units showing swollen batteries, accelerated capacity fade, or sudden shutdowns. Capacity is 2200mAh (8.54Wh) — use this figure for your own comparisons, not third-party listings.

• Z Fold3 dual-screen power architecture: The Z Fold3 runs two independent display panels — the cover screen and the inner foldable AMOLED — off a single cell stack. Both pull current simultaneously during multitasking, which stresses a degraded cell harder than a standard slab phone. This cell matches the OEM voltage rail so the PMIC does not flag a mismatch and throttle output to either display.
• Bench tested on actual hardware: We cycled this cell on a Z Fold3 motherboard and confirmed the BMS accepted the new cell without triggering safety cutoff. The fuel gauge IC initialised on first boot and the charge IC negotiated correctly with the PMIC across multiple charge events.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle at standard speed. The fuel gauge IC on the Z Fold3 is calibrated to the old cell's discharge curve — one full slow cycle lets the coulomb counter reset its endpoints against the new cell before fast charge pushes high current into an uncalibrated state.

Sudden shutdown at 20–30% on the Z Fold3 after a cell swap

The Z Fold3's inner display and 5G modem create sharp current spikes that a new, uncalibrated cell can fail to sustain at low state-of-charge. When cell voltage drops below the BMS cutoff threshold under load — even while the fuel gauge still reads 20–30% — the phone shuts down instantly. This is a voltage cliff, not a capacity problem. The fix is one full uninterrupted discharge cycle with standard charging so the coulomb counter maps the new cell's actual voltage-to-capacity curve. After that cycle, shutdowns below 30% should stop occurring.

USB-PD fast charge not accepted on the first cycle after installation

Some Z Fold3 units refuse fast charging protocols on the first charge cycle with a new cell — the phone charges slowly or shows the standard charging icon despite a fast charger being connected. The charge IC performs an impedance check on the new cell and temporarily limits current until it has enough data to confirm the cell is within safe parameters. This is normal BMS behaviour, not a faulty battery. Let the first charge complete at whatever rate the device selects, then disconnect and reconnect the charger — fast charge negotiation should resume from the second cycle onward.