ED-BP1900 Samsung NX1 Replacement Battery 7.2V 1600mAh

Samsung NX1 — 7.2V Li-ion Replacement Battery (ED-BP1900)

This is a 7.2V, 1600mAh Li-ion replacement for the Samsung ED-BP1900 battery. It fits the NX1 mirrorless camera body, including EV-NX1ZZZBMBUS, EV-NX1ZZZBQBUS, and EV-NX1ZZZBZBUS variants. Cell dimensions match the OEM unit at 55.00 × 39.40 × 21.00 mm, so it seats and latches correctly in the battery compartment.

• NX1 platform fit: All three EV-NX1 SKUs share the same battery bay geometry, contact pinout, and BMS communication protocol — one cell covers the full NX1 lineup without any physical or electrical mismatch.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the NX1 body and confirmed the BMS accepted the cell, reported charge state, and applied standard cutoff at low voltage without fault codes.
• First-cycle initialisation on the NX1: Run the first charge through the NX1 body or OEM charger, not a generic third-party charger. The NX1 BMS maps its battery-remaining display to the cell's discharge curve — one full charge cycle from the camera body locks in accurate percentage readings for subsequent use.

Why the NX1 battery percentage jumps erratically mid-shoot

The NX1 tracks remaining charge using voltage-threshold mapping rather than a coulomb counter. A new cell has a slightly different discharge curve than the aged OEM unit the camera calibrated against. Until the camera has seen at least one full discharge-to-cutoff cycle on the new cell, the percentage readout can jump — dropping suddenly then recovering. Run one full cycle from 100% to camera-off cutoff, then recharge fully. After that cycle, the threshold map resets and the display stabilises.

Shot count lower than expected with 4K video or continuous AF

Samsung's rated shot count for the NX1 is based on CIPA test conditions — still shooting, minimal EVF use, and no continuous autofocus. Switching to 4K video recording stacks sensor readout, image processor load, and in-body stabilisation draw simultaneously on the same 1600mAh cell. Continuous phase-detect AF during burst shooting adds further sustained current draw. If shot count is short of expectation, confirm you are comparing against video or burst figures, not the CIPA still-shooting number — the gap between the two on the NX1 is significant.