The HB-A290B is a high-capacity 290Wh B-mount battery engineered for professional cine cameras such as the ARRI ALEXA 35, ALEXA 265, and Blackmagic URSA Cine. Operating at 28.8V and delivering a robust 250W/10A constant load, it ensures stable and extended power for high-draw camera systems and accessories. The battery supports 100W/3A fast charging, significantly reducing downtime during production.

Equipped with dual 16V regulated D-tap outputs, a 60W USB-C port (input/output), and a 5V/2A USB-A output, the HB-A290B offers versatile power distribution for monitors, wireless systems, and mobile devices. An integrated OLED display provides real-time power information, including voltage, runtime, and capacity percentage. The battery also features a built-in LED flashlight for on-set convenience and is drop-proof from 1.2 meters, ensuring durability in demanding environments. Multiple circuit protections safeguard against overcharge, over-discharge, overcurrent, and short circuits, making it a reliable choice for professional cinematographers.