Pantech BTR-8932 N-320 Replacement Battery 3.7V 900mAh

Pantech N-320 / PN-3200 — 3.7V Li-ion Replacement Battery (BTR-8932)

This is a 3.7V, 900mAh (3.33Wh) Li-ion cell built to the BTR-8932 specification. It fits the Pantech N-320 and PN-3200 mobile phones. If your original cell no longer holds a charge or the phone shuts off unexpectedly, this is the direct swap.

• N-320 and PN-3200 compatibility: Both models run the same 3.7V battery rail, use the same BTR-8932 connector footprint, and share the same charge IC handshake — one cell covers both variants without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the N-320 platform. The BMS accepted the charge IC handshake cleanly on the first cycle, and protection cutoffs triggered correctly at both the high and low voltage thresholds.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. The fuel gauge IC in the N-320 is calibrated to the old cell's discharge curve. Running one full cycle at standard current lets it map the new cell's actual capacity before fast charging pushes higher current into an uncalibrated state.

Why the N-320 reports wrong battery percentage after a cell swap

The N-320 uses a coulomb counter and a stored discharge curve to estimate remaining capacity. When the original degraded cell is replaced, the stored curve no longer matches the new cell's actual voltage profile. The phone reads a voltage level and maps it to the old curve — so it may show 60% when the cell is actually at 80%, or drop suddenly from 30% to 0%. One full discharge to automatic shutdown followed by a complete charge to 100% resets the coulomb counter and rebuilds the curve against the new cell.

Sudden shutdown at 20–30% remaining on the replacement cell

This is a voltage cliff failure, not a capacity problem. Under peak modem load or screen-on draw, the cell voltage sags below the BMS low-voltage cutoff before the fuel gauge reaches 0% — so the phone cuts power with charge still showing on screen. It happens most often when the fuel gauge IC hasn't yet recalibrated to the new cell's internal resistance profile. Run one complete discharge-charge cycle without fast charging. If shutdowns persist past the second full cycle, check that the battery connector is fully seated — a loose contact raises effective impedance and worsens voltage sag under load.