2007Batteries/Power forum
Power supply issues when starting an ARRI 435 camera with insufficient battery capacity or quality
19 years old. Gear and prices may have changed since.
What the thread found
- When a camera shuts down immediately upon pressing the run button despite being in standby mode with video output working, the power supply may be insufficient for the startup current demand.
- Starting the camera at a low frame rate like 10fps and then switching to the desired frame rate after reaching speed can reduce the initial current draw and prevent shutdown on weak power sources.
- Batteries older than two years may develop higher internal resistance, causing excessive voltage drop during camera startup that triggers an automatic shutdown.
- A 24-volt converter alone may lack sufficient capacity to power a 435 camera with wireless focus and video transmitter running simultaneously.
Depends on
- The advice about ramping speed was reported as a workaround when batteries were not fresh, not a permanent solution.
- Battery age threshold mentioned is based on one person's experience with a specific battery model and may vary by manufacturer and storage conditions.
- No investigation was done to determine the exact power requirements or threshold voltage for the 435 in this setup.
- The original problem with the 24-volt converter was not diagnosed; only a workaround was attempted.