Some important Points before designing a Li - ion battery pack
Are you killing your lithium batteries? | Electrek
Amazon.com: ElecGear Lithium ion Battery Pack for Xbox Wireless Controller, 2X 1200mAh Li-ion Rechargeable Battery for Xbox Series X/S, Xbox One Video Game Controller with 2X Play and Charge USB Cable :
Lithium Ion Battery Pack, 3.7 V, for Solar Appliances
Intelligent Protected Lithium Battery Module with SoC Reporting (BM2)
Lithium Battery Technologies - Li-Ion and LiFePO4 Battery Pack Systems
Li-ion Battery 1PK 3.2V/1500mAh - Gamasonic USA
A Beginner's Guide To Lithium Rechargeable Batteries | Hackaday