Samsung includes a rapid charging A/C adapter in the retail package while LG and HTC do not. If you want a quick charger for the LG G4 or HTC One M9, or an extra for the office, then I can recommend the Aukey USB Turbo Charger, available for just $15.99. It's a very simple looking black charging block with a USB port at one end and wall prongs at the other.
The Aukey USB Turbo Charger comes with a 3.3 feet microUSB cable, but you can plug in any USB cable so can even charge up an iPhone or iPad. While the focus is on support for Quick Charge 2.0 technology, most devices don't yet have support for this capability. You can still charge any other device with the output of 5 Volts, 2.1 amps.
Smartphones that I know currently support the Quick Charge 2.0 technology include the LG G4, HTC One M9, Samsung Galaxy S6/S6 Edge, Samsung Galaxy Note 4/Note Edge, Nexus 6, Motorola Droid Turbo, 2014 Moto X, HTC One M8, and more. Check the specs on your device to see if it supports this fast charging technology.
If you are out and about with your device and want to top off, especially important with the battery on devices like the Samsung Galaxy S6, then you should consider the Aukey 10,000 mAh External Battery Quick Charger. This portable battery pack supports the Quick Charge 2.0 technology and can be used to charge up your device a few times before requiring charge itself.
I've been carrying the Aukey Quick Charger battery pack for about a month and took it on several trips, while also carrying it during my daily commute. This battery pack has a rugged brushed silver finish that holds up well over time. You do have to carry a USB cable and there is no method to carry on the battery pack.
It's inexpensive at just $29.99, which is a great price just for a 10,000 mAh battery pack. There is even more value added when you consider that this battery pack supports the ability to charge up your device that much faster.
Battery life is an important element in mobile devices and with more and more designs moving to an integrated battery arrangement, Quick Charge 2.0 accessories are even more important. At these low prices you can have a few chargers in your collection and ensure you have ample battery capacity for your device to perform when you need it too.
Maybe Apple will support Quick Charge 2.0 in the next iPhone. If so, Apple will likely call it something else and state it invented the technology.
ZDNet's Eileen Brown previously wrote about her experiences with three Aukey portable battery packs so if you are interested in portable battery packs check out her thoughts.