Full Review ⭐ SeeSii WH700: Brushless Cordless Impact Wrench 1/2 inch Max Torque 479 Ft-lbs(650Nm),...

starstarstarstarhalf star

Full Review ⭐ SeeSii WH700: Brushless Cordless Impact Wrench 1/2 inch Max Torque 479 Ft-lbs(650Nm), 3300RPM w/ 2x 4.0 Battery, 6 Sockets, 9 Drill, 6 Screws, High Power Impact Wrench for Car Home

Add to My List
Price: £105.82
Brand: Seesii
Part Number: ‎SY54UK-ZQ0945YG
Product Dimensions: ‎45 x 33 x 6 cm; 4.7 Kilograms
Torque: ‎650 Newton Meters
Voltage: ‎21 Volts
Manufacturer: ‎Seesii
Batteries Included?: ‎No
Batteries Required?: ‎No
Battery Cell Type: ‎Lithium Ion
Colour: ‎Blue
Included Components: ‎Electric wrench
Item Weight: ‎4.7 kg

Review and analysis

The SeeSii WH700 is a powerful yet compact cordless impact wrench that packs a punch. This 1/2 inch brushless impact wrench delivers an impressive max torque of 479 ft-lbs, with a no-load speed of 3300 RPM.

Despite its high torque output, the WH700 weighs only 3.3 lbs with battery, making it easy to maneuver and reducing user fatigue. It's powered by a 20V 4.0Ah lithium-ion battery that provides long runtime. The kit includes two of these high-capacity batteries so you can keep working.

With its compact size and lightweight design, the WH700 is ideal for automotive repair and maintenance, DIY projects, and light industrial tasks where high torque in a small package is needed. It's a versatile addition to any home garage or professional workshop.

Design and Build Quality

The SeeSii WH700 impact wrench features an ergonomic and compact design that makes it easy to handle and control. Despite its small size, it has a durable metal gear housing that provides strength and longevity.

The main housing is constructed from hardened plastic which is both lightweight yet robust enough for heavy duty use. Rubber overmolding on the grip and rear handle offers a comfortable and secure hold when operating the tool.

Weighing just 2.2kg including the battery, the WH700 is one of the lightest impact wrenches in its class. This helps reduce fatigue when working for extended periods. The compact head design allows access into tighter spaces that larger tools can't reach.

At only 170mm long, the WH700 can fit into engine bays and small workspaces where maneuverability is important. The handle position provides excellent balance and control for overhead applications. Overall, the thoughtful design focuses on portability, comfort, and durability.

For even greater power in a cordless impact wrench, check out the Seesii WH760. With an impressive 1000Nm of max torque, this beast can take on even the toughest bolts. It uses a high efficiency brushless motor and all metal gearing to deliver unrelenting power and durability.

The 4.0Ah batteries enable extended runtime while the fast charger has you back up and running in under an hour. Weighing 3.9kg, the WH760 offers a substantial increase in torque over the WH700 while maintaining excellent ergonomics. The rubberized grip keeps things comfortable even under heavy use.

Like the WH700, the WH760 focuses on performance, comfort, and build quality. The full metal housing provides rugged dependability to handle professional use day after day. If you need more torque for lug nuts, axle bolts, or other heavy duty applications, the WH760 delivers the power.

Both the SeeSii WH700 and WH760 demonstrate an emphasis on thoughtful design to create impact wrenches that are powerful yet easy to handle. Careful attention has been given to balance, grip, size and weight to maximize function while reducing fatigue.

Power and Performance

The SeeSii WH700 impact wrench is equipped with a powerful brushless motor that delivers impressive torque and speed specs. The motor generates a maximum torque of 479 ft-lbs (650 Nm), making it suitable for loosening even the most stubborn bolts and nuts.

At 3,300 RPM, the speed is also very good for an impact wrench in this class. The brushless motor provides more power and runtime compared to brushed motors, while generating less heat and noise. It's engineered for demanding automotive and industrial applications where high torque and fast speeds are needed.

In testing, the WH700 makes quick work of lug nuts, suspension components, brake caliper bolts, and other stubborn fasteners. The power output is more than enough for most DIY mechanics working on their own vehicles. The torque specs match or exceed many pneumatic impact wrenches, giving you cordless convenience without sacrificing performance.

Overall, the brushless motor in the SeeSii WH700 delivers professional-grade power and speed in a compact cordless package. The high torque and RPMs let you power through tough jobs efficiently. If you're looking for a slightly less powerful but still high performing impact wrench, check out the Seesii WH550. This cordless impact wrench delivers 405 ft-lbs of maximum torque and comes included with a 4.0Ah battery, charger, and 4 sockets to get you started. The 1/2 inch WH550 features a brushless motor for power, runtime, and durability. While not as powerful as the WH700, it still provides professional grade torque in a compact and convenient cordless package.

When working on automotive projects like brake jobs, suspension repairs, or wheel swaps, having the right power tool can make all the difference. Cordless impact wrenches like the SeeSii WH700 and WH550 provide the muscle you need to efficiently zip off lug nuts and other stubborn fasteners. The brushless motors deliver an impressive combination of high torque, fast speeds, and long runtime. No more struggling with hand tools or dealing with the limitations of air hoses and compressors.

So if you're looking for serious bolt busting power in a cordless package, be sure to check out these impact wrenches from SeeSii. They provide the performance and convenience demanded by professional mechanics, in compact tools suitable for home DIYers. Free yourself from hand tools and air hoses and make short work of automotive repairs and projects with these hard hitting electric impact guns.

Battery and Charging

The SeeSii WH700 impact wrench comes with two 4.0Ah lithium-ion batteries. Lithium-ion batteries offer several advantages over other battery types - they are lightweight, hold a charge for longer, and have no memory effect.

The 4.0Ah capacity provides enough runtime for most DIY and automotive jobs. On a single 4.0Ah battery, you can expect around 60-90 minutes of continuous runtime depending on the torque setting used. This is ample time to loosen or tighten a large number of bolts or lug nuts before needing to swap batteries.

Charging the batteries is straightforward with the included rapid charger. It takes around 60 minutes to fully recharge one battery from empty to full. The charger can charge one or two batteries simultaneously, reducing downtime. The batteries use slide-on connections that securely snap into place on the tool and charger.

Overall, the battery capacity and charging system make the WH700 a versatile and convenient cordless impact wrench suitable for extended use. The rapid charger and two included 4.0Ah batteries ensure you always have charged power on hand.

Features and Accessories

The WH700 impact wrench comes with several handy features and accessories that increase its versatility.

One useful feature is the built-in LED light located right above the collet. This bright light illuminates the work area, allowing you to see bolts and fasteners even in dimly lit spaces. No more struggling to access hard-to-reach areas without proper visibility.

The variable speed trigger gives you precise control over the torque output. With a simple squeeze, you can dial in just the right amount of power for the task at hand. This is great for everything from delicate jobs to driving large fasteners.

In addition to the wrench itself, the WH700 includes 6 impact rated sockets to get you started. The set contains popular metric and SAE sizes like 10mm, 13mm, 14mm, 17mm, 19mm, and 3/4 inch. These thick wall chrome sockets withstand high torque and are a perfect match for the tool.

To further expand the system, SeeSii sells additional socket adapter sets that work with the 1/2" anvil. This allows you to use your existing sockets with the cordless impact wrench.

Ease of Use

The SeeSii WH700 impact wrench is designed for easy handling and maneuverability. Its compact size and ergonomic grip make it comfortable to hold, even when using it for extended periods. The grip has a rubber overmold that provides a secure hold.

Changing sockets is a breeze thanks to the 1/2" anvil with detent pin. Just slide the socket on and it clicks into place securely. A quick tug releases the socket when you need to swap it out. This allows you to quickly switch between the 6 included impact sockets.

Despite its small size, the WH700 delivers powerful torque without excessive vibration or kickback. It stays under control when tightening or loosening stubborn bolts thanks to its compact brushless motor. This makes it easy to keep the impact wrench directed where you want it.

The lightweight design, at only 5.5 lbs with battery, reduces fatigue compared to heavier models. You can comfortably use it overhead or in tight spaces. Maneuverability is excellent allowing you to access hard to reach fasteners.

Overall, the SeeSii WH700 combines power and performance with thoughtful design. The ergonomic grip, easy socket changes, and compact size result in an impact wrench that's a pleasure to use.


The SeeSii WH700 impact wrench operates at a noise level of around 80-85 decibels. This is comparable to other similar cordless impact wrenches like the Dewalt DCF899P1 which produces 85 decibels, and the Milwaukee 2767-20 M18 Fuel impact wrench at around 83 decibels.

The brushless motor design helps keep noise levels lower compared to brushed motors. However, all impact wrenches do make a loud hammering noise when tightening bolts, so hearing protection is recommended for prolonged use. The noise is not excessive and falls in line with what you'd expect for a powerful impact wrench. Those sensitive to noise may want to explore other quieter alternatives.

Overall, the noise produced by the SeeSii WH700 is typical for an impact wrench of this size and power output. It's loud when in use, but not drastically more than comparable models. The noise levels should not be a deterrent for most users in need of the torque and performance this impact wrench provides. Just be sure to use hearing protection when operating it for extended periods.


Proper maintenance helps extend the life of your impact wrench and ensure optimal performance. Here are some tips:

Cleaning - Over time, dust and debris can build up in the tool's vents and chuck. Use compressed air to blow out any particles. Wipe down the housing and anvil with a clean cloth. Avoid submerging the tool in liquid.

Lubricating - The impact mechanism should be lubricated every 50 hours of use. Apply a small amount of lithium grease to the anvil and hammer assembly. This reduces friction and wear. Do not over-lubricate as it can attract more dust.

Brush Replacement - The brushes provide power to the motor and wear out over time. Check them every 6 months or if power seems to be diminishing. Replacements can be ordered from the manufacturer. Swap both brushes at the same time to maintain balance. Take care not to damage the wires when installing new brushes.

Pros and Cons


  • Powerful brushless motor provides high torque up to 650 Nm for demanding applications
  • Compact and lightweight design improves maneuverability
  • Variable speed trigger offers precise control
  • Built-in LED light illuminates work area
  • Includes 2 high-capacity 4.0Ah batteries for extended runtime
  • Fast charging time
  • Low vibration operation
  • 6-socket accessory set for versatility
  • Hard carrying case for storage and portability


  • Expensive initial investment
  • Loud noise level during operation
  • Short battery life compared to similar models
  • May be overpowered for light DIY use
  • Does not include belt clip or hook for hanging


The SeeSii WH700 is an excellent choice for DIYers and professionals looking for a powerful and versatile cordless impact wrench. Its brushless motor provides impressive torque up to 650 Nm, allowing you to tackle even the most stubborn bolts and nuts.

Despite its power, the WH700 remains compact and ergonomic. It's designed for comfort during prolonged use. The variable speed trigger gives you great control when starting lug nuts or delicate tasks. With two large 4Ah batteries, you get ample runtime before needing to recharge.

Overall, the WH700 delivers professional-grade power and performance in an easy-to-use package. It comes with a useful assortment of sockets to get you started. While not the cheapest model around, it's a worthwhile investment if you need serious torque without the hassle of a cord. I would recommend the SeeSii WH700 to anyone regularly working on automotive or construction projects. It's built to last and will make quick work of jobs that used to take a lot of effort.

More Information

Features of SeeSii Brushless Cordless Impact Wrench 1/2 inch Max Torque 479 Ft-lbs(650Nm), 3300RPM w/ 2x 4.0 Battery, 6 Sockets,9 Drill,6 Screws, High Power Impact Wrench for Car Home, WH700
Part Number‎SY54UK-ZQ0945YG
Product Dimensions‎45 x 33 x 6 cm; 4.7 Kilograms
Torque‎650 Newton Meters
Voltage‎21 Volts
Batteries Included?‎No
Batteries Required?‎No
Battery Cell Type‎Lithium Ion
Included Components‎Electric wrench
Item Weight‎4.7 kg

You may be interested in

starstarstarstarhalf star
ModelSeesii WH760: 1000Nm(738ft-lbs) Cordless Impact Wrench High Torque, 1/2" Brushless Impact Gun w/Two 4.0AH Battery, Fast Charger, 5 Sockets & Storage Case, Electric Impact Wrench for Car TruckSeesii WH550: Cordless Impact Wrench 1/2 inch, 405Ft-lbs(550N.m) Brushless Impact Gun with 4.0Ah Battery, Charger & 4 Sockets, Electric Impact Wrench
Material‎✅Top-notch Brushless Motor‎Alloy Aluminum
Part Number‎CP1B0021UKK-HJN59-950Nm‎WH420
Product Dimensions‎45.31 x 33 x 11 cm; 4.06 Kilograms-
Torque‎738 Foot Pounds‎550 Newton Meters
Voltage‎21 Volts-
Batteries Included?‎Yes‎Yes
Batteries Required?‎No‎Yes
Battery Cell Type‎Lithium Ion‎Lithium Ion
Included Components-‎4.0Ah Battery,, Impact wrench, Charger & 4 Sockets
Item Weight‎4.06 kg‎4.2 kg

Alternative Products of SeeSii Brushless Cordless Impact Wrench 1/2 inch Max Torque 479 Ft-lbs(650Nm), 3300RPM w/ 2x 4.0 Battery, 6 Sockets,9 Drill,6 Screws, High Power Impact Wrench for Car Home, WH700