It's by far the strongest built power pack that I own. I have made it into my Every Day Carry because of how solid it is. I only wish it had more juice, but then again, I would probably never be satisfied with the amountsHighly recommend it, am going to purchase a few more to throw in my BO Bag.

The best power bank you can buy in my opinion. Extreme life, versatility, accessories, and fit make this item stand out. It pairs well with their proprietary lights and solar panels. 100% would buy again!

I really don’t write reviews, but I will say this is an outstanding product. I used it out ice Fishing with the light attachment. and -15° outside we night fish on the ice for like 10 hours or so it ran the light with no issue out in the weather and in the shiny for a long period of time it was stands cold weather I know for sure it’s waterproof an awesome product couple buddies already buying some too.

I specifically wanted a power bank with lithium ION cells like this one. Most power banks use lithium polymer batteries because they're cheaper and lighter, but they're not nearly as reliable as lithium ion. As a result, this lithium ion battery will last longer and behave more predictably which is great when you're taking this places where you DEPEND on it. Upon receiving it, I was actually really surprised at how sturdy and well designed it is. It's a bit heavy for its size, but that's part of the deal. The screw on tops are very smooth and well designed. The O-ring seals and plastic components all seat together very cleanly and all the details down to the material holding the caps to the body are well accounted for. Unlike my previous battery bank, this one stays ready to charge while its on. My previous device would randomly turn off sometimes and it would require a manual reset to keep it going. You get what you pay for I guess.I really want to give this thing a 5 star rating (and frankly it deserves it) but I would like to see a configuration with more focus on USB-C ports rather than USB-A. The amount of devices requiring USB-A is rapidly decreasing and since this is more of a premium product I would expect it to skew towards the future and a long life.

This power bank is beyond amazing. If you do a lot of outdoor activities, especially ones that require you carrying gear from point A to point B, definitely pull the trigger on this one. I also purchased the solar panel to go along with it. On a bright day, this thing will charge from 0% to 100% in roughly three and a half hours. If you manage your time just right, you might be able to get it fully charged twice in a day, depending on weather and geo location. I do use a few power hungry devices on my treks, which is why I purchased the solar panel system with it. This charge block is rugged and I have dropped it a few times, but it landed in dirt and grass each time, so that probably doesn't count. It is waterproof, or at least very water resistant, as I have, on two occasions, left it outside the tent over night in the dew and ultra humid environment. I have now had this thing for eight months and it still charges the same as the day I got it. Go ahead and hit the buy button if you really want/need an ultea reliable and rugged power bank. And, get the solar panel too... both are very lightweight and add very little weight to your rig.