Apple stores are slammed because of the $29 battery replacement offer — but not everyone needs a new

Apple is currently offering iPhone battery replacements for $29. Lots of people are taking advantage of the offer, and since stores don't have the batteries in stock, they're special ordering the battery replacements, which can take days or weeks. Many people taking advantage of the battery offer don't actually need new batteries, Apple store employees told Business Insider.  Apple retail stores are struggling to handle a surge of customers looking to reinvigorate their iPhones with a...