The Astro3 12,000-mAh external battery from Anker
Description of the ports to the top of the Astro3
There are no buttons, sliders, knobs or switches to spoil its lines
The smart USB port provides full-speed charges up to 2.4 A, using smart chip technology to detect the USB pin signals and identify the device, then auto-adjusting the output to suit
A circular LED status indicator shows how much charge is remaining
The Astro3 can simultaneously charge three mobile devices, though the total output across the three ports does not exceed 4 A
Having your smartphone battery die on you just when you need it most has to be one of today's top annoyances, particularly when you're miles from a wall socket. Anker has just released a pocket-friendly backup battery pack with enough juice to charge up most modern phones six or seven times before needing a refill. The Astro3 sports three USB output ports, one of which can auto-identify the connected device and charge it at its full speed.
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