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TDI Power by Astrodyne TDI owns Dynaload. TDI Power is a manufacturer of equipment including power supplies and direct current (DC) electronic loads. TDI Power provides electronic load solutions to professionals looking for test equipment. Dynaload electronic loads are the ideal balance of affordability and reliable products. This product meets industry standards, is highly versatile, programmable, and packed full of features. Engineers purchase TDI Power’s Dynaload for power supply testing, battering testing, and fuel cell testing solutions. The Dynaload is an all-in-one electronic load system that engineers and technicians can purchase at competitive prices, used and refurbished, from ValueTronics.