I was provided an Eachine X7 10000mAh Power Bank free for testing and review and was asked only to give my honest review, so this is what I found.

What You Should Know Before You Buy:
 Small power bank with a large 10000mAh capacity for its size. About the size of a deck of cards but around twice as thick.
 Has a single 2 Amp USB charging port for charging phones or tablets.
 Large capacity that has plenty of power to charge a phone several times and an iPad just about once.
 Excellent charging speeds as compared to competing power banks. Added 20% in 20 minutes to an iPhone 6.
 Has four battery gauge LEDs to show you charging status and remaining capacity.
 Includes a Micro USB charging cable for charging the power bank or a Micro USB device.

Conclusion:
Overall, the Eachine X7 10000mAh Power Bank worked really well. It is small for its capacity and has a single USB port for charging phones or tablets.  The overall look is nice with its aluminum casing. I tested it with my iPhone 6 and iPad Mini and both charged just fine. It added 10% charge in the first 10 minutes of charging and another 10% in the second 10 minutes to my iPhone 6, which is a really good result for iPhone 6 charging speeds. It also has 4 LEDs that show the remaining capacity and charging status.  If you are in the market for a larger capacity power bank for charging your phone or tablet, this one is worth a look.
I was provided an Eachine X7 10000mAh Power Bank free for testing and review and was asked only to give my honest review, so this is what I found. What You Should Know Before You Buy:
 Small power bank with a large 10000mAh capacity for its size. About the size of a deck of cards but around twice as thick. Has a single 2 Amp USB charging port for charging phones or tablets. Large capacity that has plenty of power to charge a phone several times and an iPad just about once. Excellent charging speeds as compared to competing power banks. Added 20% in 20 minutes to an iPhone 6. Has four battery gauge LEDs to show you charging status and remaining capacity. Includes a Micro USB charging cable for charging the power bank or a Micro USB device. Conclusion:
Overall, the Eachine X7 10000mAh Power Bank worked really well. It is small for its capacity and has a single USB port for charging phones or tablets. The overall look is nice with its aluminum casing. I tested it with my iPhone 6 and iPad Mini and both charged just fine. It added 10% charge in the first 10 minutes of charging and another 10% in the second 10 minutes to my iPhone 6, which is a really good result for iPhone 6 charging speeds. It also has 4 LEDs that show the remaining capacity and charging status. If you are in the market for a larger capacity power bank for charging your phone or tablet, this one is worth a look.