14 of 17 people found the following review helpful
Does exactly what it says - no nonsense fast charging,
This review is from: PortaPow Fast Charger for Apple iPhone, Blackberry, Galaxy Note, Xperia, HTC One, Google Nexus (Accessory)
This little adaptor is exactly what I needed to allow me to fast charge fussy devices using their original power cables with some third party chargers. It's a useful addition to your USB toolkit.
A good example is trying to charge many android phones from Apple power supplies. They don't always charge at full speed as Apple power supplies do not follow the 'USB battery charging specification', instead using Apple's proprietary standard. This adaptor makes the device think that the charger follows the 'USB battery charging specification', so it will charge quickly. You'll need to make sure your charger is capable of a high current otherwise you won't see any benefit.
It has a useful second purpose too - as it blocks data transfer you can connect your smartphone to an untrusted data port to charge it and you know that data cannot be transferred from your phone.