Bitdeer Technologies Group launched its Sealminer A4 series of bitcoin mining rigs on Tuesday, with the flagship model reaching 9.45 joules per terahash, placing it among the most power-efficient machines announced by any major manufacturer. Key Takeaways: Bitdeer launched the Sealminer A4 Ultra Hydro on April 7, 2026, hitting 9.45 J/TH efficiency, among the best […]