Look at impact energy (J), speed (rpm), chuck type (SDS-plus or SDS-max), power (W), and features like rotation stop or chiseling mode. Also consider if you'll be drilling into concrete, brick, or stone.
A rotary hammer is far more effective in hard materials like concrete and masonry. It uses a pneumatic hammering mechanism that delivers higher impact energy with less effort from the user.
For light-duty work, 2–3 J is sufficient. For heavier drilling, look for 4 J or more. Power between 700–1,100 W is typical. SDS-max is used for the most demanding jobs.
Keep the chuck and ventilation areas clean, lubricate the SDS chuck if needed, inspect the power cord, and replace worn carbon brushes in brushed models. Store it dust-free and dry.
Yes, for heavier work where you need consistent, maximum power over time. Cordless offers mobility, but electric models are ideal when you have steady access to power.