LG G4 does have Quick Charge 2.0 capabilities
But you know what they say happens when you assume something. So LG released a statement that was published on Monday. The manufacturer says that while it did not do anything to have its new flagship support Quick Charge 2.0, the functionality is built into the Snapdragon 808 SoC. But that is only half the game. Quick Charge 2.0 requires a special adapter that supports the technology. LG does not offer this in the box with the phone.
If an LG G4 owner buys a Quick Charge 2.0 capable adapter, the phone will indeed recharge up to 60% in just 30 minutes. If you go to Qualcomm's website, you can see that yes indeed, the LG G4 does come with Quick Charge 2.0. That might make some users of the device feel better. Of course, buying a compatible adapter is going to put a dent in their wallets, but for many power users the cost is well worth it.
source: Qualcomm via PocketNow