Perfect UPS for Raspberry Pi

Perfect UPS for Raspberry Pi

TeckNet® PowerZen iEP390 9000mAh 5V / 3.1A Dual USB Port External battery pack portable charger power bank with LED torch built for Apple iPad, iPhone, Android Phones Tablets, Smartphone, mobile phone, PSP, GoPro, GPS (Electronics)
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Customer Review

I run both a Rapsberry Pi 1 B and a Raspberry Pi 2 with several connected USB devices. Since the operation may result as a home automation server (FHEM) a power failure in data loss and even destroyed SD card, I want to use an external battery pack as UPS.
After several failures, because the equipment had to be turned on during a power failure until - I came across this battery pack - it operates my Raspberry Pi 2 about 4 hours without interruption in case of power failure. The current consumption during charging is also unproblematic.
Construction: USB power supply (at least 2A)> Battery pack input> Battery pack output> Raspberry Server + Accessories

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