That's actually the battery seller I setup to get batteries from.
The terminal wires colors are different compared to Sunda's battery but it is wired correctly.
The battery also says 3.7V on it but the seller says that is a printing error and it is a 3.8V which is weird since the label on the seller listing says 3.8V.
I'm currently test charging one of the batteries in my Win now and when I get to work tomorrow I have a computer controlled battery analyzer there I'll use to test capacity and put a load on the batteries and measure resistance and voltage drop to check the battery quality and I'll be doing that to every battery to make sure I don't sell any duds and to make sure these batteries are actually good quality.
Also will be making a pattern template to make teflon isolators to sandwich between the battery and the motherboard that will be held in place with the motherboard screws that will hopefully isolate the battery from system heat somewhat that I'll include with all batteries I sell.
The combination teflon isolator and spacing the battery away from the
If you want to eliminate the middleman you can buy batteries directly from them at the link above for much cheaper than I or any other potential reseller can offer, just be warned as the free shipping they offer is not legal and if Chinese or US customs see it they will seize it.
That being said there are enough packages going out of China the chance of them doing so is very unlikely.
That also being said I paid for legal expedited shipping and my box shows signs of being opened and resealed multiple times so YMMV.
If you do want to get a battery directly from them I'd suggest you wait a day or two until I can test several of the ones I got to make sure they are good quality before you do so.
Supposedly that seller can get batteries of any size for you so if someone wants a certain size battery try contacting them and see what they can do.
This link should be in English.https://www.aliexpress.com/item/3-thread-8448104-3-8V-6700MAH-polymer-lithium-ion-battery-Rechargeable-batteries-Li-ion-battery-for/32836076589.html?spm=a2g0s.9042311.0.0.If7zUT