Best Cordless Angle Grinders Under $100 (2026)

The TEENO brushless is the best buy because it does the small-grinder job properly. A brushless motor is more efficient than a brushed one, which matters in a tool that pulls heavy current, and it allows a shorter gear head, so the whole tool is easier to handle in tight spaces. A 3-inch disc spinning at 19,500 rpm reaches a rim speed close to a 4-1/2 inch disc at about 13,000 rpm, so it cuts and grinds in the same range.

Two 2.0 Ah batteries let you swap while one charges, which matters because a cordless grinder drains a pack in a few minutes of continuous grinding. A 90 degree adjustable base guard deflects sparks away from your body, and an LED display shows battery and status. Against the other TEENO, the brushless version has the better motor and the guard.

Because the discs are small, they wear faster than 4-1/2 inch discs, and cutting thick steel is slow. Check that any disc you fit is rated for at least the tool's no-load rpm, and wear a face shield, gloves and eye protection. Do not remove the guard. Wear a full face shield, gloves and hearing protection, and keep sparks away from flammable materials.

The FULLYEA is the only grinder in this guide with the standard 4-1/2 inch disc on a cordless platform. That size matters because 4-1/2 inch discs are the most common size, cheap to buy in every type and thick enough to last through a job. It adds a brushless motor, 12,000 rpm and three speed settings, which is rare in a budget grinder.

Speed settings of 6,000, 9,000 and 12,000 rpm let you drop the speed for polishing, wire brushing and cutting plastic or soft metals, where a full-speed disc melts the material. Two 4.0 Ah batteries are the largest in the group, which makes it the best pick for longer jobs. A bottom switch is a safety-minded design, and the brushless motor helps battery life.

Compared with the TEENO, the FULLYEA is bigger and heavier but more capable on thick material. Compared with the corded DEWALT, it gives freedom but not the same sustained power. Always use a side handle and confirm the disc's rated speed exceeds 12,000 rpm. Swap the battery as soon as the tool slows, since a draining pack cuts poorly and wears the disc.

This TEENO is the plain mini: a 16.8V system, a 19,500 rpm motor and two 2,000 mAh batteries in a slim body. It is aimed at yard and patio work such as cutting a rusted bolt on a gate, trimming a bolt on a bench or removing paint from a railing, jobs where a full-size grinder is unwieldy.

Its light weight is the selling point, and it reaches tight spaces around gates and fixtures. Compared with the brushless TEENO, it lacks the stated brushless motor, so expect more heat and shorter run time on the same 2.0 Ah packs. The two batteries let you swap, but cutting more than a few bolts will drain both.

The small disc cuts shallowly, so it is best for thin sheet, bolts, rebar stubs and small welds. Keep several discs handy, since mini discs wear in minutes on steel, and match them to the tool's arbor size. Use eye protection and a face shield, and clamp the work, since a grinder kicks if the work moves. Keep spare discs on hand, since mini discs wear faster than the batteries.

The novorik is the cheapest cordless grinder here, and it says outright that it uses a brushed motor. A brushed motor is simpler and less costly than a brushless design, but it wears its brushes and runs hotter, which suits an occasional tool and not a daily one. The 28,000 rpm no-load speed is very high, which is only possible with a small disc, and it makes disc choice critical.

A high rpm on a tiny disc is tough on discs, so use only discs rated for that speed and replace them at the first sign of cracking. Five cutting discs come in the kit, which is useful because mini discs wear quickly. Two 2,000 mAh batteries and a rubberized handle round out a basic package.

Compared with the brushless TEENO, the novorik costs less but has a less efficient motor and no listed guard adjustment. It is a reasonable tool for trimming a few bolts and cutting thin metal, and a poor one for sustained use. Do not remove the guard, and treat the 28,000 rpm figure as a reason to check every disc before use. Check that the disc is rated for the tool's rpm before every change.

The DEWALT DWE4011 is included as a corded benchmark, because for heavy cutting and grinding a corded 4-1/2 inch grinder still beats cheap cordless ones. A 7 amp motor at 12,000 rpm sustains power as long as it is plugged in, where a small battery drains in minutes. It is designed for faster material removal and higher overload capacity.

A one-touch guard adjusts without tools, which encourages users to leave the guard in the right position instead of removing it. A hex wrench replaces the usual spanner wrench for disc changes, a hex key found in most tool boxes. Compared with the FULLYEA, it has no batteries to charge and a name-brand service network, but the cord limits reach.

For a toolbox that has one grinder, this is the one to buy if you cut or grind often. The cordless minis are conveniences for light work, while a corded 4-1/2 inch is the workhorse. Wear eye and face protection, use a side handle and let the disc come to full speed before touching the work. Clamp the work, since a grinder kicks if the work moves.