The Blackmagic Design Spares - Pocket Cinema Camera 4K (PCC4K) - PCB Battery is the internal power distribution board located within the battery compartment of the camera. While the Main PCB handles image processing, this smaller, specialized board manages the physical interface with the LP-E6 battery and regulates the incoming voltage.
Because the PCC4K uses a carbon fiber polycarbonate chassis, this PCB is secured to an internal frame that bridges the gap between the battery pins and the main power rails of the camera.
Core Responsibilities
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Battery Interface: Features the spring-loaded gold pins that make contact with the LP-E6 battery terminals.
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Voltage Regulation: Acts as the first line of defense, ensuring the raw voltage from the battery (typically $7.2\text{V}$) is stable before being sent to the Main PCB.
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Switching Logic: Manages the "handover" between the internal battery and the external 2-pin Weipu DC input. When you plug in external power, this board handles the transition so the camera doesn't shut down.
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Thermal Monitoring: Often contains a thermistor to monitor battery temperature, preventing the camera from drawing power if the battery becomes dangerously hot.
When to Replace the Battery PCB
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Broken Battery Pins: If one of the gold contact pins is bent, snapped, or has lost its "spring," the camera will intermittently shut off or fail to recognize the battery entirely.
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Corrosion: If a battery has leaked or if moisture entered the battery compartment, the traces on this PCB can corrode, leading to high resistance and power failure.
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Power Handover Failure: If the camera shuts down the moment you unplug the external DC power (even with a full internal battery), the switching circuit on this board is likely faulty.
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Physical Mounting Failure: If the battery no longer "clicks" into place because the PCB has shifted or its mounting pillars have snapped.
Technical Installation Note
Repair Level: 3 (Moderate). Replacing this board requires a partial teardown of the camera’s lower chassis.
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Accessing the Compartment: You will need to remove the bottom plate and potentially the battery door assembly. The Battery PCB is tucked deep inside the "well" of the handle.
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Wire Harness: This board connects to the Main PCB via a small wire harness (usually red and black wires). These wires are thin; ensure they are routed correctly through the internal cable guides so they aren't pinched when you re-tighten the chassis screws.
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Pin Alignment: When installing the new PCB, ensure the gold pins are perfectly centered in the holes of the battery compartment. If they are off-center, inserting a battery can bend the pins or crack the new board.
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Static Safety: Even though this is a power board, it connects directly to the camera's logic. Always use an ESD-safe workspace and avoid touching the surface-mount components.
Troubleshooting Tips
Before replacing the PCB, check for these common issues:
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Dirty Contacts: Use a cotton swab with $99\%$ isopropyl alcohol to clean the gold pins. Skin oils or dust can cause a "Battery Error" message.
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Battery "Sag": Older LP-E6 batteries may have physical wear on their plastic housing, causing them to sit loosely. Check if the issue persists with a brand-new, genuine Canon or Blackmagic battery.
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Firmware: Occasionally, a "bricked" power state can be resolved by performing a hard reset or a firmware update via USB-C with the camera plugged into AC power.
Are you experiencing a situation where the camera won't turn on at all, or is it specifically failing to recognize internal batteries?
