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Most of my gear is equipped with an USB connection e.g. my Suunto Ambit 2, my phone, my camera or my Petzl Nao headlamp. But hey, I always run out of battery after 2 or 3 days and there is no USB connection in the forrest in order to charge my devices.

I found a solution which could extend the usage of your electronic gear for a couple of days.

Anker Astro3e


The Anker Astro3E features high capacity for a low price. It also offers multiple sockets, weights 240 grams and has the size of a mobile phone.

It comes with plenty of connectors and you can even charge your iPad with it. With the battery you can charge 6 times your phone and you can even charge 2 devices at once (since it has 2 USB sockets with 3100 mA / h on each socket). There are also 4 blue lights on the front of the device which indicates the capacity of the battery. Charging of the battery via USB takes up to 8 hours on your PC and 15 hours on your laptop. The case which is included in the package seems to be useful too. It is mashed and feels quite soft – should protect the battery in case you drop it.

Anker Astro3e Suunto Ambit best usb power bank for hiking and backpacking

Here you can see how the Anker Astro3E charges my Suunto Ambit 2.