(1) ZoneSun 18650 3.7V with protection - AliExpress
https://id.aliexpress.com/item/32794816063.html
(2) ZoneSun 3200mAh 18650 Lion 3.7V with protection board
https://zonesun.world.taobao.com/category-1557596643.htm?spm=2013.1.0.0.6b1c55daKV3nmi&search=y&catName=%D4%B2%D6%F9%D0%CE%EF%AE%C0%EB%D7%D3%B5%E7%B3%D8
(3) ZoneSun 3200mAh 18650 Lion 3.7 V with protection - Tmall
https://detail.tmall.com/item_o.htm?abbucket=12&id=683994730022&ns=1&spm=a230r.1.14.16.4f2d51069kDB4G
(4) ZoneCell
https://www.zoncell.com/