Philip Morris iQos iluma i Replacement Battery BAT0264 3.7V 3200mAh

Philip Morris iQos Iluma i Series — 3.7V Li-ion Replacement Battery (BAT0264)

This is a 3.7V, 3200mAh Li-ion replacement battery for the Philip Morris iQos Iluma i and iQos Iluma i Prime heated tobacco devices. It replaces OEM part numbers BAT0264 and BAT0248. Fit this when the original battery no longer holds a charge or the device shuts down before a session completes.

• Iluma i and Iluma i Prime compatibility: Both devices share the same voltage rail and connector footprint, and the BMS handshake protocol is identical across the two. One battery fits both without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Iluma i platform. The BMS accepted the cell without fault codes, and the heating element reached operating temperature consistently across test sessions.
• Post-session charging: Do not charge the device immediately after extended use. The cell temperature rises during heating cycles. Allow at least 15 minutes for the cell to cool below 40°C before connecting the charger — charging into a warm Li-ion cell accelerates electrolyte breakdown over time.

Why the Iluma i stops heating mid-session after a battery swap

The Iluma i's BMS sets a low-voltage cutoff to protect the cell during the heating cycle. A new battery shipped in storage mode may sit at 3.0–3.1V — below the threshold the heating element needs to fire consistently. The device may power on but cut the session short because the cell voltage sags under load before the BMS can compensate. A full charge cycle before first use brings the cell to 4.2V and resolves this.

Battery draining significantly faster than expected after installation

Faster-than-expected drain on a new cell usually points to the heating element drawing more current than the battery state-of-charge can sustain cleanly. If the Iluma i's heating blade is partially fouled with residue, resistance drops and current draw increases — the battery works harder per session. Clean the heating blade with the included tool and retest. If drain normalises, the cell was not the cause; if it persists, check that the replacement voltage matches the required 3.7V nominal.