Hand drills also known as Corded drills are often lighter than their cordless cousins as there is no heavy battery pack. If you opt for a mains powered, corded drill, you will also need to use an extension lead. A cordless drill will give greater mobility as you can take it anywhere without having to tow an extension cable behind you. However, the most powerful cordless tools are usually more expensive than their corded equivalents.
Corded power drills are rated in watts. Typically ranging from 450 watts for basic models to around 1500 watts for the more powerful hammer drills. A higher wattage is better for drilling masonry. While if drilling into plasterboard, a lower wattage will suffice. For most basic home DIY jobs, a 550 watt hand drills are usually adequate.