SWIT KA-B30B 200W B-Mount Hot-Swap Battery Plate

SWIT KA-B30B 200W B-Mount Hot-Swap Battery Plate

The SWIT KA-B30B B-mount hot-swap battery plate keeps compatible cinema cameras operating while crews replace a depleted battery. Its integrated 32Wh battery supplies regulated 28V power at loads up to 200W, providing at least 120 seconds to install a charged B-mount battery without shutting down the camera.

Designed for professional cinema productions, the plate supports ARRI ALEXA 35, ARRI ALEXA 265, Blackmagic URSA Cine, and other equipment fitted with a high-voltage B-mount interface. A built-in LCD begins a 120-second countdown when the external battery is removed, giving camera teams a clear view of the remaining changeover time during live productions and demanding location shoots.

The KA-B30B also functions as a centralized power hub for camera-mounted accessories. Two regulated D-Tap outputs, a regulated 2-pin LEMO output, and a USB-A connection power monitors, wireless transmitters, focus systems, and mobile devices. An 8-pin LEMO input supports external power-station operation, while the CNC-machined aluminum housing and multiple circuit protections provide durability for professional production environments.

Key Features

• Uninterrupted Camera Power: Maintains camera operation while the primary B-mount battery is replaced.
• Integrated Backup Battery: Uses internal 28V, 32Wh, 3Ah cells to support high-voltage cinema equipment.
• 200W Continuous Load: Powers demanding cameras and attached production accessories during battery changes.
• 120-Second Countdown: Displays the remaining hot-swap time after the external battery is removed.
• Multiple Accessory Outputs: Provides two D-Tap connections, one 2-pin LEMO output, and one USB-A port.
• External Power Input: Accepts 22–33.6V through an 8-pin LEMO connection for power-station workflows.
• Professional Camera Compatibility: Matches high-voltage B-mount cameras, including select ARRI and Blackmagic models.
• Rugged Aluminum Housing: Uses a CNC-machined unibody enclosure with multiple circuit protections.

Technical Specifications

• Model: KA-B30B
• Product Type: B-mount to B-mount hot-swap battery plate
• Front Plate: B-mount
• Battery Mount: B-mount
• Battery Bays: 1
• Supported Battery Voltage: 22–33.6V
• Internal Battery Voltage: Regulated 28V
• Internal Battery Capacity: 32Wh / 3Ah
• Continuous Power Load: 200W
• Hot-Swap Runtime: At least 120 seconds at a 200W load
• Hot-Swap Display: LCD with 120-second countdown
• B-Mount Output with Battery Attached: 22–33.6V to connected equipment
• B-Mount Output with Battery Removed: Regulated 28V, up to 200W
• D-Tap Outputs: 2
• D-Tap Output Rating: Regulated 14V, 5A, 70W each
• 2-Pin LEMO Output: Regulated 14V, 5A, 70W
• USB-A Output: 5V, 2A, 10W
• 8-Pin LEMO Input: 22–33.6V DC
• Plate Material: CNC-machined aluminum
• Compatible Equipment: ARRI ALEXA 35, ARRI ALEXA 265, Blackmagic URSA Cine, and compatible high-voltage B-mount devices
• Dimensions: 5.63" x 3.66" x 1.98"
• Weight: 1.65 lbs
• Package Dimensions: 8.2" x 6.3" x 2.9"
• Package Weight: 1.98 lbs

What's In the Box

• SWIT KA-B30B B-Mount to B-Mount Hot-Swap Battery Plate