If you fancy a cordless electric scarifier: Cobra S3840V 38cm (15in) Cordless Battery Scarifier & Aerator [personally tested and proven] There are 5 working depths to select from, and you can also adjust the height of the handlebars for your comfort.
Having four wheels means that you get better traction and it makes the tool easier to handle.
The huge 55 litre collection box cuts down on the amount of times you have to stop and empty it.

Collection capacity is also an important feature, as it relates to how often you’ll be emptying the container! Medium to large gardens will need a collection box of 45 litres and above . For smaller gardens, 25 to 40 litres will do. The four working height settings are -15mm, -11mm, -7mm, and +1mm, and can be adjusted by lever with only one hand. The BMC scarifier/aerator also has a large working width if 32cm.
Accidental starts are very unlikely with this model thanks to a two stage safety operation switch. Although the fact that the machine tips over instead of standing upright could be considered a safety issue, AL-KO has taken other steps to make this machine as safe as possible. It’s the only lawn rake and scarifier I tested that has a special light to tell you if the roller isn’t inserted correctly, and it’s also equipped with a safety button that needs to be pressed before you can pull the trigger. That said, the safety button and the trigger are spaced so far away from each other that you’ll need to use two hands each time you want to turn the machine on, which is pretty awkward.The Flymo lawnrake has been designed to be compact and the foldable handles help make it easy to store away. It measures 66 x 46.6 x 39 cm and weighs 12.3 kilograms.
The 12 metre cable length is longer than average and the extra few metres comes in handy. A 35 litre, easily detachable collection bag should keep you from having to stop and empty too often and the 10 metre cable is more than enough for most average gardens. It helped that the bag was already assembled, which I very much appreciated. All that needed to be done was attach the handles (you’ll need a Philip’s screwdriver for this), as well as the trigger. I did find this a little odd, as the other scarifiers I reviewed had their triggers pre-attached. Petrol lawn scarifiers are powerful, versatile and great for large lawns. They are ideal to use in areas with lots of weeds because they aerate effectively and are heavy duty. An electric scarifier may just “bounce off” in dense, heavily weeded spots. Whereas a petrol scarifier will grind it out and finish the job. However, petrol scarifiers are heavy, emit fumes, and can be time-consuming to start. They are noisy, so you may want to wear ear defenders, and will require maintenance such as filter and spark-plg changes. Powered scarifiers. Available as either corded, where you’ll need a power supply, or cordless, these have knife blades attached to their cylinders rather than tines, making them effective at removing moss and thatch. Used on the lowest setting, they create slits in the turf, which helps aerate it.

The scarifier roller has 3 stage steel blades and does a good job of removing thatch and turning over soil thanks to the 1300W motor. The steel spring times on the lawn raker roller also work efficiently.

Alternatives to the VonHaus Lawn Rake

In my review of this VonHaus 2 in 1 Lawn Scarifier and Aerator you will learn all the features and functions of this lawn rake and whether or not it is suitable for you and your garden/lawn. The VonHaus 2 in 1 Lawn Scarifier is a powerful 1800W lawn scarifier/rake that is durable, lightweight at just 15kg and comes with a dual purpose drum that allows you to switch between two interchangeable rollers with ease. It comes supplied with a 10 metre power cable and a large 55 litre collection bag. The handles on the VonHaus 2 in 1 Lawn Scarifier can be folded down and has a built in carry handle for easy storage. I found it easy to assemble with simple to follow but basic instructions, and it comes with a 2 year warranty for peace of mind. The 1800W model comes with a manual level which allowed me to select between 5 adjustable depth height settings for all-season lawn maintenance:-12/-9/-6/-3/+3 whereas the 1500W model comes with 4 height settings. Raking Diameter You can choose from 4 different working depths for working at different times of the year, and also included is a simple, yet decent grass collection box.
This product comes with a 10 metre long power cord and should be long enough for most gardens. Pros:

With this 2 in 1 lawn scarifier, you can sweep away moss and thatch, dead grass and debris to prevent lawn diseases and improve soil drainage. Scarifiers and tillers are the ideal tools for anyone who’s looking to create a healthy lawn. We sell scarifiers and tillers from many of the world’s leading brands including Bosch, Mac Allister, VonHaus, and Hyundai. The drum on this scarifier isn’t removable, unlike the other models I tested, so it can only be used as a scarifier (not an aerator as well). However, it performs this one function efficiently; it lifts moss and thatch from the lawn and is a great option for maintenance. It doesn’t cut quite as deeply as some of the other machines that I reviewed, such as the Einhell, but that’s not necessarily a bad thing. Not every lawn needs intense scarification! If maintenance is what you’re after, rather than a complete do-over, the Bosch will produce great results. The Bosch scarifier also comes with a collection box, rather than a bag. Not only was this hard, plastic box much more robust than the fabric bags that most other scarifiers come with, but, at 50 litres, it was almost double the size too. The large collection box saves you from having to stop to empty quite as often.

Electric corded scarifiers: Lightweight, quiet and often at the budget-end, this type of scarifier is best suited to small and medium-sized gardens with a power supply. Most models come with a collection box, which is a useful, time-saving feature, but the cord length can be restrictive as well as potentially hazardous. When it comes to choosing whether you go for an electric, cordless or petrol scarifier, consider the pros and cons associated with each type: VonHaus states that their 2-in-1 Scarifier requires simple and minimal assembly, and I would definitely agree. The entire assembly process took about 15 minutes, which was faster than many of the other scarifiers I tested. A lot has changed since I first reviewed electric scarifiers a few years ago. Since testing the Cobra S3840V Cordless Battery Scarifier & Aerator I am convinced cordless models will play a part. It’s not without it’s faults but still, if you need cordless, and you don’t want petrol – it is well worth a look! Here’s me testing that:

Manual scarifiers – in addition to strong, good-sized blades, a telescopic handle is a useful feature to make it as comfortable as possible to use - a soft-grip is also a bonus. Some types are designed so you can adjust how deeply the blades rake through the grass and thatch, which is extremely useful. Scarifiers are the first tools that you should look to if you want your lawn to look its best. They work by drilling small holes in the earth to improve water circulation and oxygen levels. Scarifiers also work wonders by removing moss, grass cuttings, and other garden debris. Once the scarifier has helped to prep the ground, you can then use a tiller to complete the job. Tillers help to break up and mix the earth prior to your sowing plant or grass seeds. This is actually an improvement on the arms of the Makita and other top models in this review – their direct competitors I might add:

My Top Recommended Lawn Scarifiers

The GC-SA 1231/1 electric scarifier/aerator is an efficient and reliable combination tool that provides good service to gardeners who want to take good care of small to medium size lawns up to 300 m² through aerating and scarifying. From its colours to its design, this is very clearly a Bosch product. Yes, it’s made from plastic, but it still feels strong and durable. With a width of 32 cm and four different height settings (+10mm to -5mm), its design gives it great versatility. The Cobra cordless scarifier worked very well at removing the weeds and thatch – no question on that