Jenoptik JD 3.3 x 4 ie Replacement Battery 3.7V 1050mAh

Jenoptik JD 3.3 x 4 ie — 3.7V Li-ion Replacement Battery

This 3.7V, 1050mAh lithium-ion cell replaces the original battery in the Jenoptik JD 3.3 x 4 ie compact digital camera. It delivers the same voltage rail the camera's BMS expects, keeping photo and video capture running without modification. Physical dimensions match the OEM cell at 53.20 × 35.30 × 7.10mm, so it fits the battery compartment directly.

• JD 3.3 x 4 ie fit: The Jenoptik JD 3.3 x 4 ie uses a slim single-cell 3.7V pack in a compact chassis. This replacement matches that voltage rail and footprint, so the door closes and the contacts seat correctly without forced fit.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on camera-class test equipment. The BMS held the 3.7V nominal correctly, and cutoff triggered cleanly at the low-voltage threshold without erratic shutdown.
• First-install charge cycle on the JD 3.3 x 4 ie: Run one full charge cycle through the OEM charger or inside the camera body before heavy shooting. The camera's battery-remaining indicator maps to the cell's discharge curve during that first cycle — skipping it can cause the percentage display to jump or read inaccurately from the start.

Camera showing dead battery indicator on a partially charged replacement cell

The JD 3.3 x 4 ie reads battery state by tracking voltage against a stored discharge curve calibrated to the original cell. A new third-party cell can have a slightly different discharge profile, so the camera interprets mid-range voltage as depleted. This is a mapping mismatch, not a fault in the cell. One full charge-to-discharge cycle recalibrates the indicator — after that, the percentage display tracks accurately.

Battery percentage jumping erratically during a shoot

Erratic percentage readings on the JD 3.3 x 4 ie appear when the camera's voltage-to-percentage lookup table doesn't match the new cell's discharge curve exactly. The indicator can drop sharply during flash recycling or continuous AF, then recover when draw eases. The cell itself is not failing — the available charge is real, but the display logic is reading voltage spikes as state-of-charge changes. Letting the battery fully discharge to automatic shutdown once, then charging completely to 4.2V, gives the camera's BMS a full reference range to work from.