Byhmgard AB (publ), formerly known as Spiffbet AB, is a Sweden-based energy technology company that develops, deploys, and operates battery energy storage systems (BESS) and smart energy infrastructure solutions. The company operates in the clean technology and renewable energy sectors, focusing on power grid stabilization, flexibility markets, and energy management. Byhmgard AB provides a wide range of products and services, including utility-scale battery energy storage systems for grid-level frequency containment and restoration reserves; commercial and industrial energy storage solutions for load balancing, peak shaving, and backup power; integrated storage solutions configured for co-location with photovoltaic solar installations and electric vehicle charging infrastructure; turnkey project development services encompassing site acquisition, grid connection feasibility, engineering, procurement, and construction management; proprietary energy management system software platforms and automated trading algorithms for real-time dispatch across ancillary service markets; and continuous operations, maintenance, and lifecycle asset management services. The company serves transmission system operators, regional distribution system operators, renewable energy producers, and commercial property owners across Sweden and Northern Europe. Founded in 2011 and headquartered in Stockholm, Sweden, the company underwent a major strategic restructuring in 2025 through a reverse acquisition transaction, subsequently divesting its legacy digital gaming operations to focus exclusively on energy storage technology. Following the completion of the transaction and a renewed listing review, the entity officially rebranded from Spiffbet AB to Byhmgard AB and commenced trading under the ticker symbol BESS on the Nordic Growth Market (NGM Nordic SME) exchange.