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Today's Tech: Battery issue plagues new Apple iPhone 5S and Google+ hunts down Facebook in social media arena

Apple has found a battery defect in one of its latest smartphones that causes battery life to be significantly diminished. The defect affects a limited number of the iPhone 5S and causes battery life to drain more quickly than usual. "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," said an Apple spokeswoman. Apple declined to say how many iPhone 5S devices the issue affects but the NYT speculates that as nine million new iPhones were sold in the opening weekend, a few thousand phones will have the defective battery.

Google has announced a 58 per cent increase in the number of monthly active users of its social network Google+. Since May, the number of Google+ members who are actively using the network each month has risen from 190 million, to over 300 million. Vic Gundotra, senior vice president in engineering for Google, made the announcement at a press event in San Francisco this week, which was organised to unveil new features on Google+. Earlier this year Google+ surpassed Twitter to become the world's second largest social network, beaten only by Facebook.

The smartphone market was booming in the third quarter, thanks in large part to Samsung, according to data from IDC. Vendors shipped 258.4 million smartphones in Q3, beating the previous quarter's high by nine per cent. Samsung contributed to that boost with 81.2 million unit shipments, more than Apple, Huawei, Lenovo, and LG combined. Still, Apple saw early success with its new iPhone 5S and 5C, which helped the company grow 25.7 per cent globally over last year and ship 33.8 million iPhones during the quarter. Huawei slipped into third spot with 4.8 per cent of the market. But it barely beat out Lenovo with 4.7 per cent and LG with 4.6 per cent.

Apple is facing a class action on behalf of frustrated iMac customers that are unhappy at malfunctioning screens. Corbin Rasmussen of Idaho is heading the complainants after half of the screen on his 27in iMac went black just 18 months after the $2,259 [£1,406] purchase was completed and Apple wanted to charge him over $500 [£311] for it to be repaired as it was outside the warranty. In the complaint Rasmussen stated that although the computer was expensive he was reliant on Apple's claims that it was "designed for a long productive life" and that prompted him to buy one. The class action document states that Apple has received hundreds of complaints about the same problem and that it didn't try to fix it in 2011 when it released the new incarnation of the 27in iMac.