Cordless Power Drill questions answered
Updated June 2026Independently researchedNo paid placement.
The best cordless drill for most homeowners is a compact 18V brushless model with a keyless chuck and two batteries. Focus on battery system, torque, and ergonomics rather than peak voltage claims.
What voltage should I choose for a cordless drill?
Voltage directly affects power and weight. 12V drills are lightweight and fine for light tasks like hanging shelves or assembling furniture. 18V (often labeled 20V max) is the standard for general home use, enough torque for drilling into wood, drywall, and even mild steel without being too heavy. Higher voltage models exist, but they’re heavier and often overkill for typical homeowners. If you only turn a drill occasionally, a 12V will serve you well. For consistent projects or occasional masonry work, stick with 18V.
Brushless vs brushed motors: which is better?
Brushless motors are more efficient, run longer per charge, and deliver more torque without the heat and wear of brushed motors. They also tend to be more compact and have a longer service life. The trade-off? They cost more. Brushed motors are found on budget-friendly drills. They work fine for light, infrequent use but consume battery faster and may need replacement brushes after heavy use. For anyone planning on more than a few projects a year, spending a little extra on a brushless drill is worth it for the runtime and durability.
What does the chuck size mean?
The chuck is the part that holds the drill bit. Most homeowner drills come with a 3/8-inch keyless chuck, which accepts standard bits up to that shank diameter. That covers nearly all everyday drilling and screwdriving needs. Larger 1/2-inch chucks accept bigger bits for heavy-duty drilling in lumber or metal, but the drill itself is bulkier. Keyless chucks let you tighten and release bits by hand, convenient for quick changes. Keyed chucks are rare in modern cordless drills but still appear on some heavy-duty models. For most, a keyless 3/8-inch chuck is the right balance of convenience and capacity.
Do I need a hammer drill function?
A hammer drill adds a pulsating action that helps drive bits into brick, concrete, or block. If you ever plan to mount shelves on masonry walls or drill into a concrete floor, the hammer function is valuable. For drilling into wood, drywall, or metal, you switch it off and drill normally. Combo drills with a hammer setting cost a bit more than standard drills, but they save you from buying a separate tool for occasional masonry work. If you never drill into concrete, you don’t need it. If you do, even once or twice a year, it’s worth having.
How important are battery amp-hours (Ah) and the battery system?
Amp-hours indicate run time, higher Ah batteries keep the drill running longer between charges. A 4Ah battery will run roughly twice as long as a 2Ah battery, but it’s heavier and bulkier. Many drills come with two batteries: a compact 2Ah for light work and a larger 4Ah for extended tasks. More important is the battery system: buy into a brand’s platform because batteries are often not interchangeable across brands. A good ecosystem lets you use the same batteries with other tools (circular saws, flashlights, etc.). Look for a brand with a wide lineup and good reputation for battery longevity.
Frequently asked questions
Can I use my cordless drill to drive screws and bolts?
Yes, but use the adjustable clutch to set the torque so you don’t strip the screw head. For driving dozens of long screws into hardwood, an impact driver gives more control and less wrist fatigue, but a drill will handle most household tasks.
What is the difference between a drill and an impact driver?
A drill is designed for drilling holes and light screwdriving; it has a chuck that accepts round bits. An impact driver uses a hex collet and delivers high rotational force combined with hammering action, making it better for driving large screws and lag bolts without twisting your wrist. Many homeowners own both, but a drill is more versatile for starting out.
How can I extend the life of my cordless drill batteries?
Avoid fully draining the battery; recharge when it starts to feel weak. Store them in a cool, dry place, extreme heat degrades lithium-ion cells. If you don’t use a drill for months, give the battery a partial charge (around 50%) and check it every few months. Most modern chargers are smart, so you can leave the battery on the charger until needed.
Is a 20V drill really more powerful than an 18V drill?
In most cases, no. The 20V max rating is a marketing term used by some brands to describe the same nominal 18V battery at peak voltage. Real-world power is determined by the motor design and battery output. Compare torque and speed ratings rather than the voltage number on the box.
What should I look for in a drill for basic DIY home projects?
Start with a brushless 18V drill from a well-known brand. Features: variable speed trigger, keyless chuck, LED work light, comfortable grip, and at least two batteries. You don’t need a hammer drill unless you plan to drill into masonry. A mid-range model from brands like DeWalt, Milwaukee, Makita, or Bosch will handle almost everything a homeowner encounters.
Do I need to spend a lot of money on a premium brand?
Not necessarily. Premium brands often offer better durability, longer warranties, and a wider battery ecosystem, but many mid-tier brands (e.g., Ryobi, Craftsman, Skil) deliver excellent performance for the price. The key is to avoid no-name off-brands, their batteries often fail quickly or lack replacement support. Spend enough to get a brushless motor and a solid battery system, and you’ll be set for years.