When studying a complete set of cordless tools, remember: in a number of characteristics it is worth separately mentioning the voltage, as well as the capacity and type of battery. Voltage visually describes the power that the tool reaches. So, the professional-grade mid-range cordless multi-tool is characterized by a voltage of 36 V, while the tools are easier to pull from 4 to 14V. The capacitive properties of batteries determine the time that your tool is able to work without recharging - as a rule, this figure ranges from ½ to 3 A * h. An important point: the cordless tool is designed for several types of batteries - and this, in turn, affects the conditions in which your tool can and should be used. Lithium-ion standard batteries are considered to be “sissies”, quite fragile, but have a serious energy density. A tool with a nickel-cadmium battery can be used even at low temperatures. However, the nickel-cadmium design has its own minus - it has a pronounced memory effect.