Apple on Tuesday urged a London tribunal to block a $2 billion class action lawsuit accusing the company of “throttling” millions of iPhones with software updates to conceal their “defective” batteries. Apple’s iPhone 6 Plus Sam Tobin for Reuters: The tech giant is facing a lawsuit worth up to 1.6 billion pounds plus interest, brought by consumer champion Justin Gutmann on behalf of iPhone users in the United Kingdom. Gutmann’s lawyers argued in court filings that Apple concealed issues with batteries in certain phone models and “surreptitiously” installed a power management tool which limited performance. Apple said in written arguments that the lawsuit is “baseless” and strongly denies its iPhones’ batteries were defective, apart from in a small number of…