Apple’s iPhone 5 Battery Replacement Program has been extended, as noted by iPhone in Canada. The program, which launched last August, replaces iPhone 5 batteries in select units free of charge — a serial number checker on the site confirms device eligibility. Initially, the program was set to run until March 1, 2015, but the program now claims to cover “affected iPhone 5 batteries for 3 years after the first retail sale of the unit.”…