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Last week it was made public that Apple has been slowing down older iPhones due to aging batteries. So where can you get a new battery? What's the actual cost?

On December 28th, 2017, Apple released a statement to the public,

About a year ago in iOS 10.2.1, we delivered a software update that improves power management during peak workloads to avoid unexpected shutdowns on iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, and iPhone SE. With the update, iOS dynamically manages the maximum performance of some system components when needed to prevent a shutdown. While these changes may go unnoticed, in some cases users may experience longer launch times for apps and other reductions in performance.

This is part of the offer made by Apple,

Apple is reducing the price of an out-of-warranty iPhone battery replacement by $50 — from $79 to $29 — for anyone with an iPhone 6 or later whose battery needs to be replaced, starting in late January and available worldwide through December 2018. Details will be provided soon on apple.com.

So the big question is, is it worth it? I spoke with representatives from AT&T, Best Buy, Batteries Plus, and CPR (Cell Phone Repair). Best Buy and AT&T do not do repairs for Apple and would send them out for service. CPR would not give me a price without seeing the phone first and since I don't own an iPhone 6, I moved on. Batteries Plus, with two Kalamazoo locations, will do the repair for approximately $70 (iPhone 6) plus the cost of the battery. so that's $100 to replace a battery.

I checked a couple "trade-in" sites using the iPhone 6 as my bases. The highest trade-in offer for a perfect condition phone is $160. I could not say if that would go up with a new battery or not but why would you replace a battery just to trade it in?

In the end, the choice is yours. The lower battery price will be available from January 1st until December 31st of 2018 only.