Should I purchase a portable iPhone charger or a charging case?

Should I purchase a portable iPhone charger or a charging case?

Added (1). I'm not sure whether to buy a portable charger for the iPhone or a case with a built in charger for the iPhone. Please help me decide, and if you have any links to the product please put it in your answer too!

A case that charges may be more expensive but it's so worth it.

If you have enough money for a portable charger and a good case such as an otterbox, go with that but if you 're buying only one thing, get the charger case.

An iphone charger. Just plug it in and take it out. Simple.

What kinds of charger can be " portable" as you described? I'm not that assured of
it. But if you want to buy iphone charger, case or their regarding accessories. I can recommend
one website to you.http://www.kingsbuying.com/cellphone-accessories/cables-chargers.html,

i often bought my tablet and iphone accessories there, their price is attractive, i compared them with
other stores, their price is relatively better. But their delivery is a little long, need to take like about
two weeks, if you can wait, i think it is good for you to pick up.

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