"iPhone 4: Short battery life after replacing LCD"に関する回答I am more likely to think, that a cheap screen could be the issue? If the phone has reception and has the normal amounts of bars in a situation where you know it should have that many bars then I would exclude the the antenna problem. That would be the case if the phone is constantly trying to connect to a network. Or apple has made their devices sense that a non original part is fitted in and the new parts become voltage vampires. Could it be that the battery may shorted circuited ?