Most information on the casings of cordless power tool batteries and chargers are described using symbols and pictograms instead of words. The symbol meanings will usually be given in the instruction manual that comes with the tool. Here is a selection of the most common symbols to appear. Please note that the symbols vary between manufacturer and product so this is only a guide.
LED lit symbols
Some symbols light up during the charging process or have corresponding LED lighting patterns to indicate changing conditions to the battery and charger. For example, to indicate an error in the process or a fully charged battery.
The battery is charging correctly.
Charging is complete and the battery is fully charged.
The spanner symbol usually means that the battery is being primed or conditioned.
There is a delay in charging due to the battery being too hot or too cold.
There is a problem with the battery or charger.
There is a problem with the cooling system
There is a problem with the power lead or mains supply.
Printed information symbols
The tool should only be used indoors.
The instruction manual should be read before use.
A fuse of the type and rating written above the fuse symbol is the only type that can be used in the electrical plug of the device..
The tool is double insulated which means that it doesn’t require an earth wire but is designed so that it will not give you an electric shock when used as instructed.
The USB symbol shows where a USB connection can be inserted into the device.
The current is an alternating current (AC). Mains power is AC.
The current is a direct current (DC). Batteries use DC and chargers convert alternating current (AC) to DC.
The device is flammable or should not be used near flammable materials.
Do not burn the battery. Batteries can explode and release toxic materials and gases which harm humans as well as the environment.
The battery mustn’t be exposed to rain, snow or any other liquid. The water can short circuit the battery and damage the cells irreparably.
The thermometer symbol with a low and a high temperature in degrees Celsius next to it indicate the lowest and highest temperature the device can safely operate at.
Under EU legislation, electronic devices should not be disposed of in household waste.