NiKon EN-EL11 Coolpix S550 Replacement Battery 3.7V 680mAh

NiKon Coolpix S550 / S560 — 3.7V Li-ion Replacement Battery (EN-EL11)

This is a 3.7V, 680mAh lithium-ion cell built to the EN-EL11 specification. It fits the NiKon Coolpix S550 and Coolpix S560 compact cameras. Voltage, connector footprint, and physical dimensions match the original cell: 38.20 × 26.82 × 7.34mm.

• Coolpix S550 and S560 compatibility: Both models run the same 3.7V power rail and use an identical battery bay and contact arrangement. One cell covers both bodies with no adapter or modification needed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the S550 body. The BMS accepted the cell cleanly, the battery indicator populated correctly, and voltage held steady through flash-enabled burst sequences.
• First-cycle charging on the S550 and S560: Charge the cell fully in the camera body using the OEM charger before your first shoot. Some Coolpix bodies need one complete in-body charge cycle to map the new cell's discharge curve and display an accurate battery-remaining percentage.

Flash recycling slowing down before the battery indicator drops

The Coolpix S550's flash capacitor draws a concentrated burst of current to recharge between shots. As cell voltage sags toward the lower end of the discharge curve, that recharge current takes longer to deliver — even when the on-screen indicator still shows two or three bars. This is a voltage-sag symptom, not a capacity problem. If recycle lag appears, stop shooting and recharge the cell. A rested cell at 3.7V nominal will restore normal flash timing.

Battery percentage jumping erratically on the Coolpix display

The S550 maps its battery indicator to voltage thresholds calibrated against the original cell's discharge curve. A new replacement cell may discharge along a slightly different curve, causing the display to jump — for example, from three bars to one bar without passing through two. This is a display-mapping issue, not a fault with the cell. Run two to three full charge and discharge cycles through the camera body. After that, the indicator stabilises as the BMS learns the new cell's actual curve.