What the thread found

• One operator reverted to SUP1.5 firmware after experiencing power failures with Alexa 35 on newer software, with stable operation over nearly a year.
• Several operators report improved power stability using three or more batteries instead of two.
• B-Mount batteries eliminate power conversion in the battery module, allowing motors and camera to draw power directly; one operator reports no problems with this configuration after extended use.
• The Alexa 35 battery management system draws approximately 6.5 amps total distributed across two 12-volt V-Lock batteries, each typically rated for 10 amps.
• Using V-Lock batteries rated below 8 amps causes approximately 40% battery dropout when switching to a depleted unit; high-amperage batteries (8 amps or higher) maintain stable system power.
• Power loss occurs during motor load events such as gimbal rotation resistance or tilt axis hitting mechanical limits, suggesting possible overcurrent or short-circuit protection triggering.

Depends on

• Findings apply to Alexa 35 on ARRI Trinity rigs.
• B-Mount upgrade requires compatible battery magazine and batteries, limiting adoption where rental inventory lacks B-Mount support.
• Local rental availability of equipment types varies by region.

Gear in this thread

ALEXA 35catalog

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