On Sept 10, 2013, Apple Inc. was very proud to introduce its most forward-thinking smartphone in the world.

"iPhone 5s is the most forward-thinking smartphone in the world, delivering desktop class architecture in the palm of your hand. iPhone 5s sets a new standard for smartphones, packed into its beautiful and refined design are breakthrough features that really matter to people, like Touch ID, a simple and secure way to unlock your phone with just a touch of your finger," said Philip Schiller, Apple's senior vice president of Worldwide Marketing.

As any announcement from Apple Inc., the launch of the iPhone 5s came with a disclaimer stating that:

"Battery life depends on device settings, usage and other factors. Actual results vary."

Hence, iPhone 5s users had reported cases of crashing batteries for the iPhone 5s. This issue was a total let-down for customers as they have had high expectations about the iPhone 5s boasting of high-speed features and specifications that should be supported with a high-powered battery.

As how Apple put it: "... almost everything you do on iPhone 5s is faster and better than ever, from launching apps and editing photos to playing graphic-intensive games-all while delivering great battery life."

Unfortunately, for some users of the iPhone 5s, Apple has failed to deliver what was promised.

Admittedly, Apple Inc. said that indeed, "for a small number" of iPhone 5s devices, there was a manufacturing defect which is causing iPhone 5s battery to drain quickly.

In a statement given to The New York Times, Teresa Brewer, spokeswoman for Apple Inc. said:

"We recently discovered a manufacturing issue affecting a very limited number of iPhone 5S devices that could cause the battery to take longer to charge or result in reduced battery life. We are reaching out to customers with affected phones and will provide them with a replacement phone."

Ms Brewer was not specific about how much that "small number" actually constitutes.

She clarified though that manufacturing errors do not necessarily mean that the problem was because of defective batteries.

The number of problematic batteries was hard to estimate as Apple announced that it has already sold a record-breaking nine million new iPhone 5s and iPhone models - in just three days after its launching.

"This is our best iPhone launch yet-more than nine million new iPhones sold-a new record for first weekend sales. The demand for the new iPhones has been incredible, and while we've sold out of our initial supply of iPhone 5s, stores continue to receive new iPhone shipments regularly. We appreciate everyone's patience and are working hard to build enough new iPhones for everyone," said Tim Cook, Apple's CEO during the announcement of its record-breaking sales.

Also, as of Oct 25, 2013, the iPhone 5s was already available in 25 countries - Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, French West Indies, Greece, Hungary, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Macau, Malta, Netherlands, New Zealand, Norway, Poland, Portugal, Reunion Island, Romania, Russia, Slovakia, Slovenia, South Korea, Spain, Sweden, Switzerland, Taiwan and Thailand.

Nevertheless, another promise from Apple Inc. should echo through the ears of affected iPhone 5s owners: "We are reaching out to customers with affected phones and will provide them with a replacement phone."