iPhone owners have always been able to replace their batteries.
But many may not have realized that it was an option worth exploring until Apple's disclosure that it slowed down its older phones. The controversy prompted Apple to slash the price for replacement batteries for the iPhone 6 and newer models, to US$29 (NZ$40) from US$79 (NZ$111).
Others have followed suit. Repair site iFixit, for example, has priced its battery do-it-yourself kits for older iPhones (back to the iPhone 4s) at US$29 or cheaper.
Apple did not immediately respond to a request for comment on whether it is concerned that the replacement program will hurt sales.
But Moorhead said he doesn't think everyone is going to hold on to their phones for several more years. There will always be new software which work best on new hardware. Newer iPhones have chips that track more of your data, or work more smoothly with new features such as augmented reality.
Those are the types of changes that drive sales, surveys have shown over the years. When asked why they want to buy a new iPhone, for example, many people point to new features such as improved cameras as the prime reasons they want to upgrade. Apple also constantly makes changes to its software, improves security and offers other updates that won't work with all older models.
In other words, replacing a battery in an old phone may make it act like new, but it won't actually make it a new phone. So while Apple will take a hit in the short-term due to the price drop on its battery replacements - on which, analysts say, Apple also makes a profit - Moorhead said he doesn't think any dip will last long.
"I think that Apple wins regardless here," he said.