When evaluating jetboards, prioritize the battery capacity and chemistry (typically Lithium-ion) to ensure a runtime of at least 45-60 minutes. The motor power should ideally range between 8kW to 12kW for professional speeds (up to 55km/h), while the hull material should be carbon fiber for the best strength-to-weight ratio. Additionally, verify the waterproofing grade of the electronic speed controller (ESC) and battery pack, which must meet IP67 or IP68 standards to prevent saltwater corrosion.