NiKon EN-EL21 1 V2 Replacement Battery 7.4V 1400mAh

NiKon 1 V2 — 7.4V Li-ion Replacement Battery (EN-EL21)

This is a 7.4V, 1400mAh Li-ion replacement for the EN-EL21 battery used in the NiKon 1 V2 mirrorless camera. It powers the sensor, autofocus system, and electronic viewfinder at the same voltage and capacity as the original cell. A direct fit for the 1 V2 body with no modification required.

• 1 V2 compatibility: The EN-EL21 is exclusive to the NiKon 1 V2 — no other NiKon body uses this form factor or connector pinout. The cell voltage and BMS communication protocol match what the 1 V2 expects on first insertion.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the 1 V2 body. The BMS accepted the cell, battery-remaining display updated correctly, and the camera powered the EVF and continuous AF without triggering a low-voltage cutoff prematurely.
• First-cycle calibration on the 1 V2: Charge this battery fully inside the 1 V2 body or OEM charger before your first shoot. The 1 V2 maps its battery-percentage display against a discharge curve — one full charge cycle from within the body lets the BMS anchor that curve correctly and show accurate remaining capacity.

Why the 1 V2 battery indicator drops faster during continuous video than stills

The 1 V2 draws significantly more current during video recording than single-frame stills. The sensor runs continuously, the processor handles real-time encoding, and the EVF stays active throughout — combined, these loads pull more current than the shot-count spec assumes. The EN-EL21's 1400mAh capacity is rated against a standard stills cycle, not sustained video draw. If you shoot video frequently, carry a second cell rather than relying on a single charge.

Battery percentage jumping or resetting to 100% mid-shoot on a new cell

This happens when the 1 V2 BMS hasn't mapped the new cell's discharge curve yet. The camera uses voltage thresholds to estimate remaining capacity — a fresh cell that hasn't been calibrated can read incorrectly because its resting voltage sits outside the camera's stored reference points. Run one complete charge-to-full, shoot until the camera gives a low-battery warning, then recharge fully. After that cycle, the percentage display should track the actual charge state accurately. If it still jumps, repeat the cycle once more before assuming a fault.