Since I own a Sony a7 III and my Sound Devices MixPre-3 MK II which I usually take on multiple day trips when I go hiking or packrafting it was important for me to find out which battery pack has enough capacity and power not just for my Sony a7 III but also to charge other devices such as GoPro Hero 8, DJI Osmo Pocket, DJI Mavic Mini, DJI Osmo Action, Garmin InReach, headlamps or my iPhone.

Another idea would be to take a solar panel with you to recharge the battery pack if the trips are even longer than a week and you don’t have any access to any other power sources. However, keep in mind that Solar panels only work when there is the sun. So a trip in Greenland or Scandinavia might limit your possibilities to charge your battery pack with a solar panel. Below you can see my old power banks.

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Gear in the picture above: Anker PowerCore+ 20100 USB-C, Aputure AL-F7, Dji Osmo Pocket, iPhone, Sound Device MixPre-3

Previously, I have used the Astro E3 10000 mAh for my trips which worked quite well for 4-5 days.

However, on our trip to the Sarek National Park in Sweden we realized that 10000 mAh might not be sufficient for longer trips exceeding 4-5 days (depending on how much gear you have to charge).

As we are planning a more extensive trip this year we had a look on a USB battery which has even more capacity at a similar weight and size of my old Anker Astro E3.

After doing some research online I came across the Anker PowerCore+ 20100 USB-C which has a higher capacity and can also power devices such as a MacBook Pro. There are probably also other devices available but it’s a good idea to read reviews to make sure that they deliver the power and capacity as advertised.

Best USB Battery Pack to charge your Sony a7 III and a9 II, Sound Devices MixPre-3 II, DJI Osmo Action, DJI Mavic Mini or DJI Osmo Pocket

Features

The Anker PowerCore+ 20100 USB-C power bank provides an output of 5V and 2.4A/3A (USB-C) and can be fully charged after 8 hours. Usually, I recharge the device by connecting it to my MacBook Pro. The company advertises that it can charge an iPhone up to 7 times (which I have not tested yet).

The Anker PowerCore+ 20100 USB-C weights around 455 grams compared to 245 grams of my old Anker Astro E3 with 10.000 mAh. Moreover, I was also not able to power my MacBook Pro with my old power bank.

There is also a button on the device to power it on as well as LEDs which are indicating that the device is charging and how much has been charged already.

The size of the device is 7.2 x 2.4 x 0.9 inches.

Alternatives

There are a few alternative USB Power banks available which I would like to mention.

Anker Power House

Best USB Battery Pack to charge your Sony a7 III and a9 II, Sound Devices MixPre-3 II, DJI Osmo Action, DJI Mavic Mini or DJI Osmo Pocket

If you need the ultimate power bank in your camp then you should probably have a look at the Anker Power House. It offers a capacity of 120.000 mAh and can be connected to your car to recharge it.

EasyAcc 20000mAh

Best USB Battery Pack to charge your Sony a7 III and a9 II, Sound Devices MixPre-3 II, DJI Osmo Action, DJI Mavic Mini or DJI Osmo Pocket

If you are looking for a waterproof alternative to the Anker Power Bank then you could have a look at the EasyAcc 20000 mAh, a rugged outdoor power bank that is IP67 waterproof. Another waterproof solution is the PWR27 which can be found on Kickstarter (have not tested it myself).