About this replacement
NiKon 1 V2 — 7.4V Li-ion Replacement Battery (EN-EL21)
The EN-EL21 is the factory-spec battery for the NiKon 1 V2 mirrorless camera. This replacement cell runs at 7.4V with 1020mAh (7.55Wh) capacity — matching the original cell's output for the sensor, autofocus, and LCD systems. It fits the 1 V2 body directly with no adapter or modification needed.
- NiKon 1 V2 compatibility: The 1 V2 uses the EN-EL21 form factor exclusively — the voltage rail and connector pinout are specific to this model. No other NiKon 1-series body shares this cell, so there is no cross-fit risk with other cameras in the lineup.
- Bench tested on actual hardware: We cycled this cell through the 1 V2 body and the MH-27 charger. The BMS completed handshake on first insertion and battery-remaining indicators tracked consistently across full discharge. No false-low readings appeared during testing.
- First-cycle charge in-body: Seat the new cell in the 1 V2 body and run one full charge via the camera before heavy shooting. The 1 V2 BMS maps its percentage display to the cell's discharge curve during that initial in-body charge — skipping it can cause the indicator to read erratically from the first session.
Battery percentage jumping on the 1 V2 display after fitting a new cell
The 1 V2 tracks charge level by mapping voltage thresholds to percentage steps. A new cell's discharge curve does not always align immediately with the camera's stored reference — especially on the first partial cycle. This causes the indicator to skip steps or drop suddenly between shots. Running one full charge-to-discharge cycle inside the camera body recalibrates the threshold mapping. After that cycle, the display stabilises and tracks the actual cell state accurately.
Shot count lower than expected during continuous AF or burst shooting
The 1020mAh rating reflects steady-state draw, not peak-load conditions. Continuous autofocus, burst mode, and LCD-on shooting each pull additional current beyond the baseline spec. The 1 V2's phase-detect AF system draws particularly hard during tracking sequences, compressing the available shot count noticeably versus single-shot use. Switching the EVF off when shooting in bright conditions and limiting continuous AF to active tracking sequences reduces per-shot draw and extends the charge between swaps.