"I have a few of these Power Queen batteries, and they seem great. They arrive well packaged, with decent instructions/documentation, and (unlike some other brands) they are serial numbered. The serial number is on both the box and the battery itself.
Like all LiFePO4 batteries, they seem strangely lightweight for their size and capacity, to one used to handling lead/acid batteries. Of course, I'm expecting all these LiFePO4 batteries to blow lead/acid batteries away, in terms of years of use and number of cycles."
"With solar power storage, the ideal (in a practical price range) is generally LiFePO4. As with others, this is impressively light compared to AGM. The quality of the build seems similar to others, meaning sturdy enough for some light knocking around such as in a scooter. The connectors are also well made and the typical size. I have a couple from this brand and would buy more, assuming they last the normal lifetime (10+ years). I will update this review otherwise."
"I tested this Lithium Iron battery with a Cadex machine using a discharge only cycle. It's 99% of the 10Ah capacity on the first run and 101% on the second. That's good for starters. I love LiFePO4 for solar applications where the panel and equipment is pole mounted. A 10 year life span and less weight to boot. Well worth the cost."