Hardware Reference
In-Depth Information
(Source: Image courtesy of
adafruit.com
)
Figure 9.16
LiPoly-powered watch.
Another widely used power option for advanced wearables that draw a lot of current,
such as a video jacket, is a USB battery pack designed for recharging cellphones and tab-
lets. These packs often have beefy amperage output in a portable hard case that's easy to
store in a coat pocket or handbag.
