Identification of ferrite beads/chips?

So i have this mini in my shop that got damaged during a repair. ipad still works and i have found the correct component here on i fix it to get it fixed. A coworker caught one of the chips next to the battery connector and now the unit doesn't charge, but I'm pretty sure i found the correct part through another post here on iFixit. But this experience has brought a new issue up pertaining to my abilities as a repair tech which leadsd me to my question. My real question is, can anyone shed some light on how to identify ferrite beads/chips that are used in mobile devices?

http://www.digikey.com/product-search/en...

The link is to a page with examples of what I'm talking about. It seems these are used everywhere in mobile devices now days and unlike your usual capacitors/resistors you would find on a pc mobo or tv inverter board, they have no markings other than size and color.

I am pretty good at soldiering smd of all sizes and i have fairly basic understanding of how these newer components work but i am completely ignorant as to how the are identified.

So i guess my real question is how can i identify the correct bead/chip needed without having to hope someone here has already gotten an answer on a specific device i am attempting to repair?

Answered! View the answer I have this problem too

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lesta786 you do not identify those without a schematic or a working board and a pair of smart tweezers. There is no other way.

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Ty, that was a helpfull point in the right direction.

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