Oraimo OPB7400Q 4000MAH

Features:
You can easily slips it into any of your pockets or bags.
40000mAh of power charges most phones over 5 times, tablets at least 3 times and any other USB device multiple times.
Built-in safeguards protect your devices against excessive current, overheating, and overcharging.
Suitable for charge most of digital devices, such as smartphones, tablets and other USB-powered devices.
Dual charging port with oraimo Fast-Charging technology charges two devices at the same time – without sacrificing charging speed.
Surge protection, short circuit prevention and more advanced safety features keep you and your devices safe.
Built-in L-E-D Display exactly shows remaining capacity in digital format. See how much charging po wer is left at a glance.