Hardware Reference
In-Depth Information
RoHS doesn't require specifi c product labeling, but many manufacturers have adopted
their own compliance marks. Visual indicators may include “RoHS Compliant” labels,
green leaves, check marks, and “PB-Free” markings. The WEEE trashcan logo with an X
through it is also an indicator that the product may be compliant (see Figure 10.1).
FIGURE 10.1
The WEEE Directive logo
Battery Disposal
All batteries contain toxic substances, such as metals, and can contaminate the environment.
Wet-cell (lead-acid) batteries, such as those used in cars and boats, are the most
environmentally harmful and have the most stringent disposal guidelines. However, dry-cell
batteries, such as those used in PCs and other electronics equipment, are also environmentally
hazardous. They contain heavy metals such as mercury, lead, cadmium, and nickel, all of
which can contaminate the environment when not disposed of properly, and they can release
toxic chemicals into the air when incinerated.
Some of the places where batteries are used in PCs include the following:
Portable computing devices (laptops, phones, and so on)
Wireless input devices, such as wireless mice and keyboards
Motherboards
Uninterruptible power supplies (UPSs)
Most regions have laws requiring retailers that sell certain types of batteries also to collect
them for recycling. The exact rules depend on the battery type and the region. For example,
the Battery Directive in the EU (2006) regulates the manufacture and disposal of batteries
in the EU. These regulations don't require consumers to recycle; they only require retailers to
make that option readily available. The same is true in the United States. Consumers aren't
required to recycle most batteries, but vendors are required to take them if consumers want
to bring them back.
