Jupio CFU0011 Fujifilm NP-50 Compatible Battery 3.7V 800mAh

Jupio CFU0011 — 3.7V Li-ion Replacement Battery

This Jupio CFU0011 is a 3.7V, 800mAh Li-ion replacement cell for Fujifilm digital cameras that take the NP-50 battery type. It slots into the camera body and powers the image sensor, processor, and display. Dimensions are 40.26 x 35.24 x 6.50mm — check these against your battery compartment if you are unsure about fit.

• NP-50 platform compatibility: Fujifilm cameras in the NP-50 family share the same voltage rail, connector pinout, and BMS communication protocol. This cell meets that voltage spec and connector layout, so the camera body can negotiate the charge state correctly.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on NP-50 compatible hardware. The BMS accepted the cell without rejection flags, and voltage held stable across the discharge curve until the low-cell cutoff triggered cleanly.
• First-install charge cycle: Run the cell through one full charge in the camera body before a heavy shoot. Some Fujifilm BMS firmware maps the battery-remaining display to a discharge curve it only learns after the first charge cycle is completed inside the body itself.

Battery percentage jumping erratically on the Fujifilm display

Fujifilm cameras map remaining battery to specific voltage thresholds calibrated to the OEM cell's discharge curve. A new third-party cell discharges along a slightly different curve, so the indicator can jump — say, from 60% to 20% — without warning. This is a display calibration issue, not a cell fault. Complete two or three full charge-discharge cycles through the camera body and the indicator mapping typically stabilises. If it does not settle, check that the resting voltage after a full charge reads at or above 4.1V.

Shot count lower than expected when shooting with flash

Flash capacitor recharge draws a significant current spike after every shot — far beyond what the sensor and processor pull alone. At 800mAh, this cell is rated to Fujifilm's NP-50 spec, but continuous flash use stacks recharge current on top of AF, EVF, and stabilisation draw simultaneously. The result is a noticeably lower shot count than the camera's rated figure, which is calculated under controlled, mixed-use conditions. Reduce flash frequency or switch to manual flash power to cut the recharge spike and extend the number of shots per charge.