I've owned a few battery packs in the past I had purchased on amazon, they all worked for the first 1 - 2 times and then broke. This pack worked great. It does take some time to charge which isn't an issue. I purchased it as part of a backcountry 6 day hunt elk hunt and it worked great to charge my iPhone 12 pro and my Garmin inreach + I would tell anyone that is looking for the product for the same application in the backcountry. If you are really conscience about weight I would get the next size down, this thing is only a tad bigger then the size of an iPhone but it feels like its 2lbs. As for charging, it does charge phones fast. With my iPhone 12 I got what seemed to be 3 full charges with it and it still had a little power left in it. In all, great product. If I were to do it again I'd get the opt for the 10000 mAh or better yet just get the fast charge power bank (in 10000 or 15000mAh), not the Qi wireless as my OtterBox case is too thick for that to be any value and it adds more weight to the power bank. In all though, good product and would recommend if you need power in the backcountry.