High Quality Li-Ion Drill Supplier in China

BOSI Tools is a professional manufacturer of Li-ion drills from China, offering a range that includes the Li-ion Brushless Impact Screwdriver, Li-ion Brushless Screwdriver Drill, Li-ion Brushless Drill, and Li-ion Brushless Impact Drill.

High-quality brushless motors paired with 23+1 torque settings, from a 16V lightweight body to 20V impact functionality — BOSI delivers a full-scenario Li-ion drill solution, providing efficient and flexible driving and drilling tools for furniture assembly, equipment maintenance, and installation construction. We can provide selection advice and customized solutions based on actual working conditions. Please feel free to contact us at any time.

Working Principle

The essence of a Li-ion drill is to convert the DC electrical energy stored in the battery into rotary kinetic energy via a brushless motor, which then drives the chuck and drill bit through a planetary gear set for speed reduction and torque amplification, completing drilling or screw fastening and removal.

The brushless motor eliminates the need for carbon brushes and a commutator; an electronic controller precisely switches the current direction based on the rotor's position, resulting in lower energy consumption and a longer service life.

BOSI Li-ion drills branch into three lines based on this foundation.

The Li-ion Brushless Drill covers a torque range from 16V/35 N·m to 20V/60 N·m, with a two-speed mechanical adjustment offering low and high gears of 0-450/1500 r/min or 0-500/1800 r/min.

The 23+1 torque clutch automatically slips once the set torque is reached, protecting screws from over-tightening.

The Li-ion Brushless Impact Drill adds an axial pulse to the rotary action, with an impact frequency ranging from 0-7500 to 0-27000 IPM, enabling drilling into hard materials like brick walls.

The Li-ion Brushless Impact Screwdriver is fully geared toward bolt fastening and removal, delivering a peak torque of 160 N·m. Its 1/4" quick-change chuck is compatible with standard bits, and with a speed of 3400 r/min and an impact frequency of 4000 impacts per minute, it accumulates high pulse torque, all in a body weighing just 0.71 kg.

The entire series comes standard with a metal chuck and a high-capacity battery, with the brushless motor and electronic control ensuring long-lasting runtime.

Our Li-ion Drills vs. Other Brands: Why Choose BOSI?

BOSI Li-ion drills are powered by a full series of brushless motors and paired with 23+1 precise torque adjustment and a high-capacity battery, achieving higher torque output and battery endurance at the same price point.

How to Choose the Right Li-ion Drill?

The primary criteria for selection are the required torque and the material being worked on. For light assembly and DIY, choose the 16V screwdriver drill. For batch screw driving and frequent drilling, choose the 16V or 20V Li-ion Brushless Drill. If drilling into brick walls is required, choose the 20V Li-ion Brushless Impact Drill, a three-in-one tool. For automotive removal and installation and high-torque bolts in steel structures, the Impact Screwdriver is essential, with a peak torque of 160 N·m and a quick-change chuck, making it far more efficient than a standard drill.

Common Problems and Solutions

Safety Precautions for Use

1. Battery Safety

Use the original charger for charging. Do not leave the battery on float charge for extended periods. Protect the battery from high-temperature exposure and immersion in water. Store with a 30%–50% charge. Keep the battery contacts clean. When plugging or unplugging, hold the battery housing, not the wires.

2. Chuck Operation

After locking the drill bit or driver bit in the metal chuck, use the wrench or hand-tighten it. Perform a test run before starting to confirm there is no wobble. When installing a bit into the quick-change chuck, push it in until you hear a click confirming it is locked.

3. Torque Adjustment

Before driving screws, pre-set the torque setting based on the screw’s specification and material, and test with a low setting first to avoid stripping. Among the 23+1 settings, the "1" position is the drilling mode. When drilling mode is engaged, the torque clutch is deactivated, and the tool must be held with both hands to prevent torque reaction.

4. Operating Posture

Reduce the feed pressure at the moment the drill bit breaks through to prevent the bit from binding and causing the tool to twist back and injure the wrist. When working with the Impact Screwdriver under high torque, grip it with both hands and stand clear of the rotation plane. Wear safety goggles when using the impact drill on brick walls.

5. Maintenance and Storage

If not used for an extended period, remove the battery and store it separately, recharging it once a month. Regularly clean dust from the chuck and gearbox; the brushless motor is maintenance-free. Store the entire tool in a dry place, and protect it from being crushed by heavy objects.