Web Research - make a list of different electronics with...
Web Research - make a list of electronic products that use a micro USB port to charge the battery.
You need to know what a "Micro USB port" is. (http://static2.businessinsider.com
The list will be a product, like Camera, and more specific like Canon DSLR
It would benefit you to locate many different charts that contains many different products, such as "android phones", then you could review the list and see what type of port the device uses to charge. We only care about micro usb ports on the electronics.
You will search top websites (best buy, tiger direct, etc...) for current products offered for sale.
Android Samsung Galaxy Sii
Android Samsung Galaxy Siii
Android Samsung Note
Android Samsung Note ii
Cannon DSLR, EOS Rebel T2
Cannon DSLR, EOS Rebel T3