Julian Ilett | Julian's Electronics Postbag #158 - Balance, Measure, Boost @JulianIlett | Uploaded April 2023 | Updated October 2024, 3 days ago.
Battery related stuff from AliExpress

aliexpress.com/item/1005004352468732.html

aliexpress.com/item/32844130457.html

aliexpress.com/item/1005001339542680.html

datasheet.lcsc.com/lcsc/2001071338_EG-Micro-EG2104M_C480653.pdf
datasheet.lcsc.com/lcsc/2008301206_TWGMC-SI2302_C727152.pdf