Apple, the American multi-national technology company, has acknowledged it has taken action that slows the performance of its older iPhones.
This iPhone was shiny and new in 2007, but phone batteries don't exactly age gracefully.
Apple has been intentionally slowing down older iPhones, and some of its users aren't happy about it.
"From what I can tell, Apple slows down phones when their battery gets too low, so you can still have a full days charge", wrote Reddit user TeckFire. On the site, Apple notes that the battery created to retain up to 80 percent of its original charge after 500 charges.
Ms Karissa Chua, a consumer electronics consultant at Euromonitor International, said it was common for the battery, speed and performance of all smartphones to degenerate over time with every update to the operating system and apps. Although it's expected that battery life tends to lessen as a device gets older, due to the increased volume of recharging cycles, associated performance shouldn't grind to a halt.
Doron Myersdorf, CEO instant-charging battery startup StoreDot, said that "smoothing out" means that phones will reorder incoming commands to make sure not all of them are done in parallel.
Apple releases new iPhone models annually, and sales of the handsets power its money-making engine. This year's iOS 11.2 extended the feature to the iPhone 7 and 7 Plus.
Apple claims that Poole's results are attributable to a year-old feature that prevents certain iPhones from "unexpectedly shutting down" when their batteries aren't supplying "peak current" - something that can happen "in cold conditions", on "a low battery charge", or "as they age over time".
Apple said it changed its software a year ago for the iPhone 6, 6S and SE to "smooth out the instantaneous peaks only when needed".
"Our goal is to deliver the best experience for customers, which includes overall performance and prolonging the life of their devices", said an Apple spokeswoman.
One solution to a faster working iPhone could be purchasing a new battery rather than an entire new phone. People with the iPhone 7 and "other products" will soon get the update as well with iOS 11.2. If you're going to slow down the phone over time, you should explain why it is happening, so people understand it is ultimately for their benefit. "When your battery is degrading, you have the choice of either living with a slightly slower operation of the phone, or changing the battery", he said.