About this replacement
Fujifilm XQ1 / XQ2 — 3.6V Li-ion Replacement Battery (NP-48)
The NP-48 is a 3.6V, 850mAh lithium-ion cell that powers the Fujifilm XQ1 and XQ2 compact cameras. It slots into the same battery compartment as the original and connects to the same three-contact interface. Use it as a spare to keep shooting when your primary cell runs down.
- XQ1 and XQ2 compatibility: Both cameras share the same battery bay dimensions, contact layout, and BMS voltage thresholds — 3.6V nominal, 4.2V fully charged. One NP-48 cell works in either body without modification.
- Bench tested on actual hardware: We ran this cell through the XQ1 body and confirmed the BMS accepted the cell, reported charge state correctly, and held the protection circuit within expected cutoff parameters at both low and high charge boundaries.
- First-cycle charging on the XQ1 or XQ2: Charge the new cell inside the camera body using the OEM USB cable before your first shoot. Some Fujifilm BMS firmware maps the battery-remaining indicator to the discharge curve during the first in-body charge cycle — skipping this step can cause the indicator to read inaccurately.
Why the XQ1 battery indicator jumps erratically with a new cell
The XQ1 maps its battery-remaining display to a voltage-threshold table calibrated against the original cell's discharge curve. A new replacement cell may have a slightly different internal resistance profile, causing the camera to misread voltage at mid-charge levels. This shows as the indicator jumping from three bars to one bar and back without warning. Running one full charge-discharge cycle in the camera body lets the firmware re-anchor its thresholds to the new cell — after that, the display stabilises.
Flash not fully recycling between shots on a new NP-48
The XQ1 flash capacitor draws a short, high-current pulse to recharge after each fire. If the camera body is cold or the cell hasn't reached a stable operating temperature, internal resistance rises and the capacitor recharge current sags. The result is a longer-than-normal recycle gap or a weaker flash output on back-to-back shots. Warm the battery to room temperature before shooting in cold conditions — above 10°C the cell delivers the full recharge current the capacitor needs.