Open main menu

Anker Astro Mini External Battery

rated 4.0 of 5 stars
photo:   Anker Astro Mini External Battery power storage

This slim and sleek external battery is excellent for charging your phone (or other electronic device) on overnight trips in the great outdoors. A lot of people use their phone as their camera or for GPS, and this external battery allows you to charge your device without having electricity. It's also fairly inexpensive!


  • Metal casing
  • Charging speed
  • Slim size


  • Amount of charge

This external battery/portable charging device works excellent to charge your mobile electronics on overnight trips. Depending on how much you use your phone and what you use it for, you could possibly get two nights out of it. I own an iPhone 5s and this external battery will charge my phone 1.5 times from 0% battery life. I have used this charger so many times and it has consistently charged my phone the same every time. 

This Anker charger will charge your device at about the same speed a wall charger will (at least for the iPhone). To work this product, you will need to charge the external battery the night before you go on your trip so it has juice to power your mobile device. Then when you need an extra boost in battery, plug your phone chord into the usb input on the external battery (see pictures).

This external battery weighs 2.8 oz. and packs a big punch for it's size. I always have it in my pack or on any trip I go on. 

I think that this charger is a great buy. It has come in handy on multiple occasions and I have charged my phone with it (it has to be) hundreds of times! 

3 1/2" long

A little less that 1" in diameter 


Shows the external battery charging. The light turns green when fully charged.

Source: bought it new
Price Paid: $14

Your Review

Where to Buy

Help support this site by making your next gear purchase through one of the links above. Click a link, buy what you need, and the seller will contribute a portion of the purchase price to support Trailspace's independent gear reviews.

You May Like


Price Reviewers Paid: $14.00

Recently on Trailspace

Åsnes Rabb 68 Review

Black Diamond Alpine Carbon Cork Review

Campingmoon XD-2F Review

Limmer Boots The Lightweight Review

Alfa Free A/P/S GTX Review

Rottefella Xplore Backcountry Off-Track Review