About this replacement
Casio Exilim Zoom EX-Z19 Series — 3.7V Li-ion Replacement Battery (NP-60)
This is a 3.7V, 720mAh (2.66Wh) Li-ion replacement for the Casio NP-60 battery cell. It fits the Exilim Zoom EX-Z19, EX-Z85, EX-Z85BK, EX-Z85BE, and over 53 additional Exilim Zoom models that share the same NP-60 footprint and voltage rail. Dimensions are 42.75 × 38.10 × 4.50mm — same physical envelope as the original cell.
- Exilim Zoom NP-60 platform fit: Casio consolidated a wide range of compact Exilim Zoom bodies onto the NP-60 form factor — same connector orientation, same 3.7V nominal rail, same BMS communication protocol. One cell covers the full lineup.
- Bench tested on actual hardware: We cycled this cell through the EX-Z85 body using the OEM charger. The BMS accepted the cell without error flags, and charge termination triggered cleanly at full capacity.
- First-cycle initialisation on Exilim bodies: Run one complete charge cycle inside the camera body or OEM charger before heavy shooting. Casio's battery-remaining indicator maps to a learned discharge curve — skipping this step can cause the indicator to read inaccurately from the first use.
Flash recycling slowdown on the EX-Z85 toward end of charge
The EX-Z85's built-in flash draws a short, sharp burst of current to recharge its capacitor between shots. As the cell discharges below roughly 3.5V, the available current for that recharge cycle drops. The camera slows flash recycling to compensate, which shows up as longer waits between flash-enabled shots. This is normal Li-ion discharge behaviour — it is not a fault with the cell.
Battery percentage jumping erratically on the Exilim display
The Exilim Zoom's fuel gauge maps display segments to voltage thresholds it learned from the original cell's discharge curve. A new replacement cell may discharge at a slightly different slope, causing the indicator to skip segments or jump non-linearly. This typically stabilises after two or three full charge and discharge cycles as the camera recalibrates its threshold mapping. To speed this up, drain the cell to auto-shutoff and charge fully to 4.2V twice in succession.