I have a 30 pin cable that came with my portable charger, but it doesn’t fit my iPhone 5. What can I do?
Older Apple devices required a cable with a 30-pin connection at the end. These include iPad, iPad 2 and iPad 3, iPhone 1st generation, iPhone 3 and iPhone 4, and 1st through 4th generation iPod touch.
Apple switched to a lightning cable 2012, and all devices released after that time use this cable. This would include iPhone 5, iPhone 6, iPod touch (5th generation), iPad 4, iPad Air, iPad Air 2, and iPad Mini.
These devices would be incompatible with a 30 pin charger, unless you were to use an adapter, which Apple does sell, at around $30 or so.