A powerful electric circular saw is an excellent choice for making firewood. Here are some features you might want to consider when choosing such a saw:

Engine power: Look for a circular saw with a powerful enough engine to cut through harder woods like oak or beech. Typically, high-powered saws have motor power between 1,500 and 2,500 watts or more.

Diameter and power of the saw blade: Choose a circular saw with a saw blade of sufficient diameter and power to cut through the firewood of the desired diameter. Larger diameter saw blades can cut thicker pieces of wood in one cut.

Adjustable cutting depth and angle adjustment: Make sure the circular saw can adjust the cutting depth as needed. In addition, it is convenient if you can adjust the cutting angle so that you can cut different pieces of wood at an angle.

Stability and safety features: Look for circular saws that are stable and equipped with safety features such as a guarded saw blade and trigger lock.

Ease of use: Prefer circular saws that are user-friendly, such as comfortable handles and easily adjustable guides.

Maintenance: Also check the need for maintenance – prefer a saw that is easy to care for and maintain, and whose parts are easily available and replaceable.

In addition, make sure that the circular saw you buy meets all safety requirements and standards and that you have familiarized yourself with all safety instructions and user manuals provided by the manufacturer before use.