Comparison Ryobi R18MI-0 vs Ryobi R18I-0

The maximum pressure provided by the pump or compressor — in other words, the highest tyre pressure that can be achieved using this unit.

In most models, this figure is from 2.5 to 10 atm, and in mechanical pumps (manual and foot, see "Type") pressure of more than 10 atm is practically not found at all. This is due to the fact that even for heavy trucks, the optimal tyre pressure is usually about 5 – 9 atm (depending on a number of parameters — there are special formulas and tables for calculations); and in passenger car tyres, a pressure of more than 2.5 atm is extremely rarely used. However, there are compressors with higher pressure parameters — 11 – 15 atm, 16 – 20 atm and even higher. The meaning of such characteristics is mainly in the "power reserve": a higher working pressure contributes to faster pumping. However, be careful not to over-inflate the tyre and damage it.

The length of the hose through which air is pumped into the tyre. The larger it is, the more convenient the device is to use. But it is rare that the compressor is left far from the wheel, especially if a pressure gauge is placed on the device, which must be periodically checked. For domestic use in cars, a one and a half metre long hose is enough. Powerful and performant models can be equipped with a hose of 7 metres or more, but these are more solutions for commercial use in car services.

The presence or absence of a battery supplied with the corresponding compressor. This item may also indicate a built-in battery.

Models with a removable battery are usually produced for a specific battery platform (see the corresponding paragraph). The advantage of this solution is obvious: first of all, it allows you to use the same battery both to operate the compressor and for another power tool supporting a similar battery platform. For normal full operation of the device right out of the box, 1 battery is enough. The option without a battery becomes relevant if the customer wants to choose a power source separately, or when such a source is already on the household.

Many compressors are equipped with a built-in battery. This design saves the customer from fiddling with a separate charger, but does not allow you to quickly replace a dead battery with a fresh one - the only option is charging, which requires a power source and takes some time. However, models with a built-in battery are often more compact, which benefits them exclusively for future use.

The name of the battery platform supported by the device. A single battery platform is used to combine various power tools of the same brand (screwdriver, grinder, circular saw, etc.) into one line. Devices belonging to the same platform use interchangeable batteries and chargers. Thanks to this, for example, there is no need to select a battery for each individual model, because one battery purchased as a spare can be used in various power tools, depending on the situation or as needed. Batteries of the same platform mainly differ from each other except in capacity.

The nominal battery voltage for which the cordless tool is designed.

Manufacturers select battery voltage taking into account the operating characteristics and the power supply required to achieve these characteristics. In practice, this means that most often you can not pay attention to this parameter at all when choosing. The only exceptions are some specific situations - for example, if the “household” already has a battery from the same company and you want to evaluate its compatibility with the selected model, if the selected tool comes without a battery and you want to immediately order a power source for it, or for accurate comparison of batteries by capacity. But after purchase, voltage data can also be useful for searching for chargers in addition to or as a replacement for the “native” charger.

Models of batteries compatible with the device.

When choosing a tool, this information is relevant mainly for models without a battery included. For devices supplied with batteries, the battery model is more of a reference value - it is indicated mainly “for the future” if a spare or replacement battery is needed. However, this data can also be useful during the selection process - for example, to assess compatibility with a battery you already have on your household, or to find detailed data on compatible batteries and determine how well they meet your requirements.

The presence of backlight pressure gauge in the design of the device.

This function requires a power supply, so it is found mainly in the corresponding type of device — compressors (see "Type"). Its purpose is generally obvious: thanks to the backlight, you can easily see the readings of the pressure gauge in low light conditions and even in complete darkness. Such an opportunity when working with a compressor is useful — and not only at dusk and at night, but even in the daytime: many garages, boxes and other places where you have to service a car are very sparingly lit, and even during the day the pressure gauge scale may not be visible without additional illumination.

Many pumps/compressors come in special cases or cases that make them easy to store and transport. Under the cover, usually, we mean a classic cloth bag, which pumps are often equipped with and which rather protects them from dirt, dust, etc. But compressors are often supplied in plastic cases, they are convenient, inexpensive, rust-resistant and equipped with a convenient carrying handle . Plastic is considered less durable, but it is quite enough to provide the necessary protection.