About this replacement
JVC GR-DV3 / GR-DV5 Series — 7.4V Li-ion Replacement Battery (BN-V607)
This is a 7.4V, 1300mAh Li-ion cell built to replace the BN-V607 in JVC MiniDV camcorders. It fits the GR-DV3, GR-DV3U, GR-DV5, GR-DV5U, and 27 additional models in that lineup. Swap it into the battery compartment directly — no tools required.
- GR-DV3 and GR-DV5 series compatibility: These models share the same battery bay geometry, contact pinout, and 7.4V power rail. One cell covers the full group. The BMS in each body reads the same voltage thresholds, so the remaining-charge display behaves consistently across all supported models.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the GR-DV3 platform. The BMS accepted the cell on first insertion, voltage held steady through the mid-discharge range, and the protection circuit tripped cleanly at the low-voltage cutoff without an unexpected shutdown.
- First-cycle initialisation on MiniDV bodies: Run the first full charge inside the camera body using the OEM charger connection — not a standalone third-party charger. Some JVC bodies in this series calibrate the battery-level indicator during that first in-body charge cycle, and skipping it can cause the indicator to misread capacity from the start.
Why the GR-DV3 shows a dead-battery indicator on a partially charged replacement cell
The GR-DV3 maps its battery-level display against a voltage curve it learned from the original BN-V607 cell. A new replacement cell has a slightly different internal resistance, which shifts the resting voltage readings the body uses for each indicator segment. The camera body interprets that voltage offset as a lower state of charge than actually exists. Running one full charge-and-discharge cycle inside the camera body lets the BMS re-map against the new cell's actual curve.
Battery percentage jumping erratically during recording
During active recording, the GR-DV3 draws current from the cell for the tape transport motor, the LCD, and the CCD sensor simultaneously. That combined load causes the cell voltage to sag briefly, and the camera's voltage-threshold indicator can jump one or two segments in response. This is not a faulty cell — it reflects the indicator reacting to instantaneous load voltage rather than true state of charge. If the jumps persist even under light load with a fully charged cell, check that the battery contacts on both the cell and the camera body are clean and making full contact.