markz
100 TW
Even a generic battery from a reputable battery builder costs a lot of money, its not even on the same level as the ebay, amazon, aliexpress, alibaba sellers selling unkown quality batteries out of their garage. Even though some quality builders do sell off those platforms those are in a different league.
I'd stay away from something like that, yes Sturmey-Archer is a great brand, top quality but that battery is going to cost a lot of money.An new model people recommended me from Neuzer has a frame battery and a Sturmey-Archer 3-Speed Hub.