Sharp VL-NZ80 Replacement Battery BT-L445 7.4V 2000mAh

Sharp VL-NZ80 Series — 7.4V Li-ion Replacement Battery (BT-L445)

This 7.4V, 2000mAh Li-ion battery replaces the Sharp BT-L445 and BT-L445U cells. It fits the VL-NZ80, VL-NZ50S, VL-NZ155, VL-NZ105, and over 27 additional Sharp MiniDV camcorder models. Same voltage, same connector, same BMS handshake as the original pack.

• VL-NZ series camcorder compatibility: These models share a common 7.4V two-cell Li-ion architecture with a matched connector and BMS communication line. That uniform power rail is why one pack covers the full range without any adapter or modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a VL-NZ80 body. The BMS accepted the pack on first install, reported accurate charge state, and held voltage through sustained recording load without triggering a premature low-battery cutoff.
• First-use charge cycle on MiniDV camcorders: Run one full charge cycle through the OEM charger or inside the camcorder body before your first shoot. Sharp's BMS on this series maps the battery-remaining indicator against internal cell data — skipping this step can cause the display to read inaccurately for the first few sessions.

Why the VL-NZ80 drops to "low battery" warning early on a new pack

Sharp's battery gauge on the VL-NZ series uses a voltage-threshold map calibrated to the original cell's discharge curve. A fresh replacement cell with a slightly different internal resistance will cause the indicator to trigger the warning at a higher state of charge than necessary. The camcorder isn't actually low — the gauge hasn't yet learned the new cell's curve. After two or three full charge-discharge cycles through the camera body, the readings settle and the warning aligns correctly with actual remaining charge.

Camcorder shows no battery or powers off immediately after inserting new pack

This happens when the replacement cell ships at a low storage voltage — typically below 3.0V per cell, or around 6.0V total pack voltage. The VL-NZ80's BMS interprets this as a dead or invalid battery and refuses to power the device. Place the pack in the OEM charger for a full charge cycle before inserting it into the camcorder body. Once the pack reaches at least 7.2V, the BMS re-evaluates and accepts it normally on the next power-on.