2 of 3 people found the following review helpful
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This review is from: TeckNet PowerEx 1 Built-In-Cable 6000mAh (Duo-Output 3.4A Output) Smart USB Portable Charger External Battery Power Bank With BLUETEK Smart Charging Technology For Andoid Smartphones and Tablets (Wireless Phone Accessory)
I bought this for my Neuxs 4 phone, 5200mAh can charge twice of my phone theoretically. In fact the phone can be charged 1.5 times. overall, it is worth to buy. It is very useful for travelling.