Going by Amazon, there are maybe 30 to 50 brands of jump packs. My first pack from a couple years ago, a cheap Soaki doesn't appear to be still sold on Amazon, mine has worked fine with no issues. No idea why its not sold, it had a lot of good reviews, as I mentioned in my first post the one I just bought for $40 had 1200 mostly positive reviews. Some bad reviews are about failed units, about half are failed users.
What exactly are the expensive name brands selling? I can buy 3x of the one I bought and have it still cheaper than the same rated size Noco, which has a shorter warranty.
Project Farm does some nice reviews, but the weak point is that they are testing ONE device of each brand type, and my bet is that every brand and model has some variation in quality.
Buy cheap, but only models with plenty of good reviews and a decent warranty. Hint on quality is that Amazon wants $7 to make the warranty 3 years, money back usually no questions asked. Effectively its $2.35/ year to rent a working jump box.
Whatever you buy TEST IT, cycle the charge in the battery a couple times. I plan to routinely leave mine out and use the phone charging power bank function to discharge the pack.
