[AllyCat]

Hi,

This model seems to have a better solar panel (crystalline silicon), ... 

https://www.aliexpress.com/item/LED-sola...st=ae803_3

When I looked at that link two days ago, I think it said it has a Crystalline Cell with voltage (2v?), power/current rating and battery (600 mAh?) specified,  but I can't find any of those details in the "Product Details > Item Specifics" tab now.  
EDIT: Ah, looking further down, those figures do appear after several other products. I wonder if they really do apply to that one? The Chinese are now even making "fakes" of some Chinese products.

I have encountered a few low-cost solar garden lights with (Poly-)Crystalline cells, but the vast majority use Amorphous silicon.  However, as Werk implies, they're really only expected to run for a year if you're lucky.  A NiMH cell treated "kindly" may give around 500 charge-discharge cycles, but these are taken down into "deep discharge" every night, 365 times a year.    

Personally, I'd start with one of the small crystalline 4 - 6 volt cells from Banggood such as this or this at just over $1 delivered (or a little more from a local Warehouse).

Cheers,  Alan.