SuperLight Lithium-ion batteries are designed and manufactured by Freefly. They work with any device that uses the Freefly Open Battery Interface: Astro today, others coming soon.
Every pack has a built-in Battery Management System (BMS) and hi-res OLED screen. The BMS takes care of discharging and charging without balance leads. The OLED screen gives detailed information about pack status, like State of Charge to 1% accuracy. The USB-C port can charge devices with Power Delivery, even computers like MacBookPro.