About this replacement
Panasonic AG-DVC62 / NV-MX500 Series — 7.4V Li-ion Replacement Battery (CGA-D54)
This 7.4V 5400mAh Li-ion cell replaces the CGA-D54 battery pack used in Panasonic MiniDV professional camcorders. It fits the AG-DVC62, NV-MX500, NV-MX350, NV-GX7, and over 130 additional Panasonic models sharing the same battery bay and connector footprint. Capacity is drawn from product data: 5400mAh / 39.96Wh.
- AG-DVC62 and NV-series compatibility: These models share a common 7.4V two-cell Li-ion architecture with the same D-series connector and BMS communication protocol. One cell format covers the full broadcast and prosumer MiniDV lineup from this generation.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Panasonic MiniDV body. The BMS accepted the cell without fault flags, and protection circuitry tripped correctly at both the low-voltage cutoff and during a simulated overload event.
- First charge cycle on the AG-DVC62: On first install, charge the battery inside the camera body or OEM charger before shooting. Some Panasonic MiniDV BMS units require one in-body charge cycle to map the new cell's discharge curve and display accurate battery-remaining percentage on the viewfinder.
Battery percentage jumping erratically on the AG-DVC62 viewfinder
The AG-DVC62 uses a voltage-threshold lookup table to estimate remaining charge. A new Li-ion cell has a slightly different discharge curve shape than an aged original cell, so the camera's BMS maps voltage readings to wrong percentage steps. This is most visible in the middle of the discharge — the indicator can drop from 60% to 30% in seconds, then hold steady. One full charge-discharge cycle via the OEM charger recalibrates the table. After that cycle, the percentage display tracks the cell closely at all charge levels.
Camera body warm under sustained AG-DVC62 video recording
During continuous recording, the AG-DVC62 draws simultaneously from the sensor, tape transport motor, LCD panel, and image stabilisation system. Combined, this load is significantly higher than standby or menu use. The cell surface and camera body warming up is normal under this combined draw — it does not indicate a fault. If the body becomes hot to the touch and recording stops unexpectedly, check that the battery terminal contacts are clean and making full contact; oxidised pins increase resistance and generate extra heat at the junction.