iPhone owners have less than two weeks to replace battery for £25

Cost of out-of-warranty battery replacements is due to jump to as much as 65

Owners of iPhones with failing batteries have 12 days to take advantage of Apple's out-of-warranty 25 battery swap offer before the price rises to as much as 65.

The discounted battery replacement scheme, which applies to the iPhone 6 and newer models, was launched following revelations last year that Apple was intentionally slowing iPhones because of worn batteries.