They are not telling you the battery chemistry. This is a massive red flag for me. Secondly, they are not spec'ing a capacity or discharge rate. Given all of these, I'd never touch the product. (I deal with batteries professionally, so I have strong opinions here.) That being said, very likely this is what they are selling (or a lower capacity version if it.) https://www.aliexpress.com/item/1005003162463074.html?spm=a2g0o.productlist.0.0.6d5f5368NYfbFY It I was buying this, I'd at least buy from someone who had the decency to spec a nominal charge capacity. (edit: and to be clear - I'm not saying that Aliexpress supplier has a good product or not. About 70% of the batteries on the market are fraudulent when it comes to capacity ... likely these are the same.)