[0.81 lb] I've owned various Ravpower and Anker chargers over the years and picked this one up for the more unique pink color, which will help me pick it out at crowded outlets and from my bag. I was nervous from the pictures that it would be a toy-like Hello Kitty pink, but rather it's a stony, sophisticated, Scandinavian pink, like something you'd find in a Hay design store. Charging functions are great, it is fairly light and provides just the right amount of charge for a full day out of heavy use (plus some extra juice for a friend). The only nitpick, if I can think of any, is that the blue lights stay on for a strangely long time, and the power button is tiny. But overall form factor is lovely.

[Lithium-Ion] I use this battery to charge my devices while on location in remote areas, and I keep the Power Bank itself charged via a solar panel at the same time (during the day, via the USB C input only port), which is is well matched with one of my panels outputs.
I can simultaneously power / charge my MacBook Pro 13 via the USB C in/out port, 2 Canon LP-EN6 batteries (with Nitecore UCN2 Pro QC), my phone or a Gopro 10, though that would pretty much drain all its juice if the toys were flat to start with, so, for multi day missions, you may want more than one, or make sure you can keep up with the Solar charging... The two USB-C Ports are not the same, if you have ~40W or more of solar power, make sure to use the in/out port, else you will lose half of your available solar power if using the in only port...
I made up a USB-C to 12V cigarette / car charging outlet adapter, which allowed me to charge a DJI Drone battery using a DJI car battery charger, though it may actually charge better from the solar panel directly - this system is not the most efficient solution, but I can charge at night...
I also use it to supply extra power to cameras placed to run for extended periods, or for cameras with high power demand via the USB-C out. This is far lighter and more affordable per Ah than many other options, and I have had no issues, including use from rainforests with 100% humidity to below freezing conditions. Buying more before my next expedition...

[Carbon Fiber] Does the job, and is a great size to be portable. Wife loves it.

[0.81 lb] Charges my cell phone four times Excellent product. Highly recommend

[USB-C] Super small and light compared with other models. Changes quicker than other banks I have purchased. Easy to fit in pocket along side phone if necessary. High quality build as NITECORE demonstrates on all their products.

[Carbon Fiber] This power bank adapter by Smallrig is ALMOST the perfect solution. I wanted to find a way to mount my Anker 737 power bank to my gimbal so my camera doesn't run out of battery on long shoots and after a lot of research I found this one. The reason why I chose this one is because it uses a flexible strap to secure your power bank but the reason why I say "almost the perfect solution" is because I have to stretch the strap to the max to get my power bank on there. I understand this adapter isn't designed to hold large power banks which is why I still give a 5 star. So overall this adapter is the best solution if you're looking for one. Just know if you have a 2 inch thick power bank you'll most likely be able to put it on, you'll just have to stretch it to the max.

[USB-C] This is the perfect oversea travel mosquito repeller that is TSA ready. No butane gas cans or cartridges. Love that it's also a powerbank. A must for travel.

[Carbon Fiber] I normally dont write reviews but I needed to let everyone know how awesome this product is. I am a college student and love taking pictures. I got this power bank as a gift from a friend. I didnt realize how useful this Power Bank really was. I feel like I have to take it with me every where I go because I am always needing power.

[Carbon Fiber] I'm very impressed with how long it holds a charge, and how quick it charges up.

[USB-C] I'm a traveling filmmaker/photographer. This is a great power bank to rely on when I'm out filming. Holds a charge really long.
Clean, beautiful design. You can tell it's well built. Quality product.