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power bank external battery

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power bank external battery Customers Reviews

  • Very useful on-the-go charger

    posted by svenberkvens

    - Quite small: mobile phone size, just slightly thicker.- 6000mAh is enough to fully charge my HTC Desire twice- Includes cables for input AND output- Can charge two devices at once- Good quality build, has a soft touch too
    I always have this in my backpack so that I can always charge my phone when I need to. Perfect!
    A requirement for owners of a smart phone that drains its battery within a day.
  • Charger

    posted by Mipiii

    Charger is to look good and looks pretty good. After pressing the button, the LED lights up 1-4 which shows the remaining battery capacity. A large number of connectors is good quality.
    The manufacturer should add more battery charger to be true capacity 20Ah.
    Charger next time you not buy because it has only 12000mAh capacity. The price is good and the build quality too.
  • Just Great!

    posted by Vauldon

    -It can charge your cellphone up to two times, or give your tablet a longer life. -The usb interface makes it very easy to charge everywhere.-And the size and weight makes posible to carry it around without any problems (9,5x2,4x2,2 cm)
    -If you are going to carry it with the strap, be sure to check the weather, water could enter the device, the USB is upwards when carried by the strap.
    -Just great if you work all day in the streets with a heavy use of cellphone (as my case).
  • best buy

    posted by RobertoGoz

    the portable battery works well , simulate a power supply turn on during 30 minutes.You can use to any device that use usb to charger
    The size is perfect to use in any where and with any system that use usb to charger.During the charger are there the led to change from red (charger) to green ( charger full)
    I recommend buying this device.I am not sure if has 3000mAh, but it help me every time that I need to use.
  • This is a great, pocketable power source for charging smartphones

    posted by rlhess

    These (I bought three) are very useful when my two sons run out of smartphone power in the middle of nowhere. I have one as well for the same reason.Very easy to use with devices that are charged via a USB cable. It just inserts between the USB charger and the phone (in essence), although I tend to charge them separately, often from PC's USB ports (as they are handy).
    Please remember to turn off the device when done as there is some drain from the internal inverter circuitry (and LEDs) as long as it's on.The 6000 mAh capacity is related to the cell at roughly 3.4 V, so the 5.5 V output of the unit will be about 3300 mAh, estimating a 90% inverter efficiency. Still, it's 20 Wh of power in a slim case.
    Nice package, I would buy more if I needed one.

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