DZ-BP28 Hitachi DZ-MV200A Replacement Battery 7.4V 3300mAh

Hitachi DZ-MV200A Series — 7.4V Li-ion Replacement Battery (DZ-BP28)

This is a 7.4V, 3300mAh Li-ion replacement for the Hitachi DZ-BP28 battery. It fits the DZ-MV200A, DZ-MV200E, DZ-MV208E, DZ-MV230A, and four additional DZ-series camcorders that share the same battery bay and connector layout. Capacity is 3300mAh (24.42Wh), matching the original specification.

• DZ-MV series compatibility: These camcorders share a common battery bay geometry and a two-pin communication line that carries BMS handshake data. All listed models draw from the same 7.4V rail and use identical connector keying, which is why one cell fits the full range.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on DZ-series hardware. The BMS accepted the cell without fault codes, held the voltage curve through full discharge, and the protection circuit tripped correctly at the low-voltage cutoff threshold.
• First-cycle conditioning on DZ camcorders: Run one full charge from within the camcorder body or the OEM Hitachi charger before your first recording session. Some DZ-series units need a camera-initiated charge cycle to calibrate the battery-remaining display to the new cell's discharge curve.

Battery percentage jumping on the DZ-MV200A display after fitting a new cell

The DZ-MV200A maps its fuel gauge to a fixed voltage-threshold table built around the original cell's discharge curve. A new replacement cell may discharge at a slightly different rate through the mid-range, which causes the indicator to skip steps or drop suddenly. This is a calibration mismatch, not a fault with the cell. Run two full charge-and-discharge cycles through the camcorder body and the indicator will track the new cell's actual curve more accurately.

DZ-MV200A showing dead battery indicator on a partially charged replacement

If the camcorder displays a dead or low battery immediately after fitting a new cell, the BMS has not yet accepted the replacement. This happens when the cell's resting voltage sits outside the window the camera expects to see on first read. Connect the battery to the OEM Hitachi charger and allow a full charge to complete — do not interrupt. After a full charge cycle, reinsert the battery; the camera should read it correctly. If the indicator still drops immediately, check that the cell contacts are clean and making firm contact, as the DZ-MV series is sensitive to contact resistance on the communication pin.