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Power Storage

Top Picks

How we choose: The best power storage highlighted here were selected based on 99 reviews of 21 products. Our top picks are those that are readily-available in the United States and have received the highest overall ratings from reviewers.

How we test: Trailspace is powered entirely by our community of readers. The reviews posted here reflect the real-world experiences of outdoor enthusiasts just like you.

If you've used a power storage that you think should be listed here, please share your experience.

Disclosure: Trailspace never accepts payment for gear reviews, product placement, or editorial coverage. When you buy through affiliate links on our site, Trailspace may earn a small commission, which helps cover the costs of running the site.

Seattle Sports SurviVolts Power Bank

user rating: 5 of 5 (1 review)

The power bank, 5000 mAh capacity, can recharge a cell phone or power an included set of components useful for lighting or emergency signaling especially. It is compact and portable, although not ultralight.

Reasons to Buy

  • Basic power supply, coupled with useful components, reliably switched and interchanged

Reasons to Avoid

  • Usage is not entirely straightforward. One needs to read the instructions and handle the unit before using it in earnest.

My initial impression is quite favorable. The basic power bank seems to be a 26850 lithium-ion battery with an integral small flashlight, potentially quite useful if you ever need to assemble the other components in the dark. Four blue LEDs indicate the charge status. Other components are: a siren, fire starter, flashlight, lantern/SOS flasher, and red laser. These all plug into a USB outlet on the power bank which is adjacent to a mini-USB receptacle on the port which recharges the power bank.

Read more: Seattle Sports SurviVolts Power Bank review (1)

EasyAcc 20000mAh Rugged Power Bank

user rating: 5 of 5 (1 review)

This is the most durable power bank that I have found. It's dustproof, waterproof, and shockproof. It also has a built-in flashlight and SOS signal.

Reasons to Buy

  • Dustproof
  • Waterproof
  • Shockproof

Reasons to Avoid

  • Kind of large

I have been looking for a portable battery bank for a long time. My phone and cameras are always running low when I am out traveling or hiking with my family. I was about to get a cheap power bank, but then EasyAAC approached me about making a video of their battery bank for my YouTube channel.  In the video below I unbox the power bank and check out all of its features. I expected for a power bank to just charge some batteries, but this does so much more, and it holds a ton of power, 20,000 mAh to be exact.  My favorite thing about this power bank is how rugged it is.

Read more: EasyAcc 20000mAh Rugged Power Bank review (1)

BioLite KettleCharge

user rating: 4 of 5 (2 reviews)

A kettle with a built-in thermoelectric generator that can charge USB-powered devices off-grid. Heat water, get a charge. A superb option for emergency use during power outages and something to consider for multi-day basecamp expeditions, but likely too much weight to justify its presence on most backpacking trips.

Reasons to Buy

  • Heats over any flame (don't plop it in the fire, though)
  • Charges devices off-grid while boiling water
  • Device output can equal power outlet charging rates
  • Can make water potable, heating water for food or drink
  • Great emergency option

Reasons to Avoid

  • Heavy
  • Device efficiency subject to variables of use
  • May stop working and require re-boot
  • Cost

BioLite KettleCharge The BioLite KettleCharge is a flat, stainless steel kettle with an opening for filling or pouring from the kettle, and a plastic handle that rises about the top of the kettle with an embedded LED panel and an on/off button. It is a thermoelectric device that produces electricity to charge devices while it heats water. It is a device that—according to the BioLite web site—“provides off-grid power in a matter of minutes using nothing but heat and water.” “Perfect for camping or power outages,” BioLite writes, “the KettleCharge will keep you charged day or night with BioLite's core thermoelectric technology.”  A simple control panel guides one’s use of the device.

Read more: BioLite KettleCharge reviews (2)

InstaPark Mercury 10 Solar Panel Charger

user rating: 4 of 5 (2 reviews)

On a week-long, dark backpacking trip, I kept my phone/camera and GoPro fully charged. I can only imagine if I have SUN. Very affordable and would highly recommend.

Reasons to Buy

  • Best value I found
  • Worked as designed
  • Durable

Reasons to Avoid

  • Weighs a little over a pound with two batteries
  • A bit bulky for packing tight
  • Still about 3-4 hrs to charge

As weight conscience as I was, I never regretted bringing this on my trek. I looked and research other, more popular, chargers, but they offered less, lower watts, and cost more. This solar charger is a 10 watt, three-panel charger that includes two external batteries (USB and Micro connections) cables and even a special iPad/iPhone port. The day I got it in the mail, I grabbed the 1-page instructions (thank goodness, 1 page), a dead GoPro, and put it outside my office door on a sunny day. I had a quick question about the LED's on the spare batteries, and Support responded within 24 hours or much less. It charged the GoPro in about 3 hours.

Read more: InstaPark Mercury 10 Solar Panel Charger reviews (2)

Xiaomi Power Bank 20000 mAh

user rating: 4 of 5 (1 review)

Very capable (but large and heavy) power bank with two-way QuickCharge support and dual USB output. Nice and simple design, but no case or pouch for carrying. Mostly useful for owners of power-greedy equipment, such as action cameras.

Reasons to Buy

  • Very large capacity (est. 74 Wh gross), good for charging 2-3 tablets or 4-7 smartphones in row
  • QuickCharge 3.0 technology supported in both directions
  • Two USB outputs (up to 18W output)
  • Fully recharged in just 5-7 hours with QC-compatible wall charger
  • Simple and minimalistic design
  • Great value for money (in Chinese shops)

Reasons to Avoid

  • Bulky and heavy, prone to accidental damage
  • No carrying case or pouch included
  • Definite overkill for charging a smartphone in short trips
  • Little advantage over a pair of 10K power banks from the same brand
  • No economy slow charging mode

Background In my outdoor trips I prefer avoiding the situations when I need a power socket for charging my electronic devices. There are many of them: smartphone, a couple of headlamps, health tracker, GPS navigator, DSLR camera, and every year this number grows. At some point it became impossible to store all the required energy in built-in and replaceable batteries, so I started carrying the power banks with removable 18650 Li-Ion batteries (I have a good stock of such batteries for powering the Chinese flashlights).

Read more: Xiaomi Power Bank 20000 mAh review (1)

Anker Astro Mini External Battery

user rating: 4 of 5 (1 review)

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!

Reasons to Buy

  • Metal casing
  • Charging speed
  • Slim size

Reasons to Avoid

  • 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).

Read more: Anker Astro Mini External Battery review (1)

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