Motors & Blades: High-speed motors (often 7000RPM) paired with durable stainless steel blades.
Battery & Charging: Lithium-ion batteries that provide anywhere from 60 to 180 minutes of cordless use per charge. Some models (like the ST-5610) even feature solar charging or dual AC/DC power.
Displays: Many units include built-in LED screens to monitor battery percentage and speed settings. [1, 2, 3, 4, 5]