@Becky84 I just reread your post and you realised you described your batteries as 'noname'.
What's ironic is that the main companies (Sony, LG, Samsung) that produce quality lithium batteries do so mostly to be used in battery packs for power tools and the like. They bear the model and batch number, but are devoid of any other flashy branding. In fact they declaim the use of their batteries for the vaping purposes.
The 'name' batteries you are probably referring to are from companies like Efest or MXJO which are often stocked at vape shops. These companies take batteries from the companies I mentioned before, put new plastic wraps on them and market them directly to vapers. The problem is they often put exaggerated ratings on them, and despite being shiny and colourful are usually a poor choice compared to genuine cells.
The point is that you have inadvertently ended up with just about the best battery you could of for your setup. Good job.