noun which may take the genitive case particle 'no'
electric; electrical
Used as a no-adjective to describe devices, systems, or methods that are electrically powered or operated, often in contrast to mechanical or manual types.
この車は電気式のパワーステアリングを採用している。
This car uses an electric power steering system.
電気式の暖房器具はガス式より安全だと言われ
Electric heating appliances are said to be safer than gas ones.
電気的 is a na-adjective meaning 'electrical' in a more abstract or scientific sense, whereas 電気式 is a no-adjective used for concrete types or systems.
Compound of 電気 (electricity) and 式 (type, style, method).