Apple landed in hot water last year when it hid the fact of deliberate performance throttling on iPhones with degraded batteries. In order to make up for it, the company announced a battery replacement program, under which the degraded batteries on such handsets could be replaced at considerably lowered costs. To recall, Apple is charging Rs 2,000 instead of the usual Rs 8,200 for replacing the batteries inside the iPhone 6, iPhone 6s, iPhone SE, iPhone 7 and the iPhone 7 Plus. This discounted pricing, however, is valid only till December 31, 2018. This is probably the best time for affected users to get their iPhone battery replaced. Do note that battery service at the reduced pricing may be limited to one repair per iPhone and if you have already sent your unit for service, you could be charged.