Multiple users on Apple's iPhone support forum are reporting big drops in battery life after upgrading their handsets to version 6.1 of the iOS operating system.Related StoriesiPhone 5S and iPhone 6 spotted at Apple suppliers, both to launch this year - reportSteve Wozniak says Apple's iPhone is behind in smartphone market: 'Samsung has caught up'New renderings compare iPad 5 with iPad 4, iPad mini, iPhone
