GrapheneFast by TuffGear 9000 mAh Quick 40 minutes Re-charge Graphene Battery Technology Power Bank for iPhone, iPad Samsung Galaxy and more (silver)

I was not to sure about this product when I first purchased it, but having read about graphene batteries I thought I would take a chance. My first use was after having charged the battery about five weeks before use. I was able to charge my iPhone twice and my iPad Pro as well. I still had charge left in the battery but was already home so I did not need to use it anymore at the time. I was impressed with the capacity of the battery. The surprising thing was the speed at which the devices charged. It seemed to charge almost as quick as you put it down, made a cup of coffee and came back to a charged device (seriously I did not time it, however it clearly impressed me). For the cost, I would say this is a great deal and plan to carry it in my pack whenever I go off.

This battery will charge and is apparently well built. But it will not charge another devic. It will begin to charge the second device, then shut off. It will not complete the charge cycle, making this device useless.

Yep. Where are the others? Good for the urban landscape. Charge and get out. 40 minutes. Of course I bought 2. Added power strip. Thumbs up. And buying more. Good wepon

Charged so fast, but now it is dead 2.5 months later

I've been looking for a good Graphine battery and finally found one. This thing recharges in less than 30 minutes!I'm looking forward to getting the 4k one because it's smaller for the pocket and charges in 15 mins!I got 2 full charged on my Samsung S7. Will charge my iPad next and update this review.