I have dropped iPhone 4 into water. It is working fine after that but only one problem it is discharging it's battery very fast even on standby. Could not understand I have changed battery for new one and still the same. Please could anybody can advise what is wrong with it. Thanks.
Sounds like water damage to the motherboard, this means $$$$$$$ I would suggest buying a new iPhone or taking yours to Apple to have it replaced iPhone 5 32GB White, iPad 3 16GB Black, iPod Video 5.5G 120GB, Shure SE425's, Dell XPS 13 UB
What yateseyd said. When the battery is draining rapidly it is normally not because that battery went bad, but some other internal component is damaged which is sucking the juice out of the battery. If you can make sure all of the water damage indicators are still white, you can just take it to apple and theyll replace it no questions asked.