It’s like the Swiss Army Knife of battery packs, and even includes (extremely slow) solar charging.

The Outxe Savage is built to withstand a lot of abuse, and it comes with solar charging, but it’s heavy, and the solar feature is necessarily dog-slow.

The Outxe Savage 20,000 mAh battery pack looks more like an Otterbox case in that it’s designed to withstand a few floor drops—and maybe even a quick dip in a stream or pool thanks to its IP67 rating. The tough exterior is covered in plastic, with a bumper system protecting the corners and perimeter of the battery pack.
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https://www.pcworld.com/article/3281336/outxe-savage-20-000mah-battery-pack-review.html