That is correct. LiIon batteries don’t outgas when charging. Outgassing often means a catastrophic failure is imminent.

“Charging for too long” is not a thing for any kind of lithium ion battery.

A lithium ion battery requires something called a BMS (a battery management system) which is responsible for ensuring the battery doesn’t get too hot when charging or discharging. Good quality Batteries often include multiple temperature sensors and fuses inside their BMSes so power is cut or charging halted if abnormal condition are detected.

Unfortunately, due to the popularity of these devices from escooters to e-cigarettes that use LiIon batteries, it is inevitable that some unscrupulous individuals attempt to cut corners to bring “cheaper” batteries to market that often do not contain these safety mechanisms, or less robust versions of them.

Long story short don’t buy no-name branded shit that has LiIon batteries, and don’t worry about charging it. Once it’s full, it stops automatically. Remember phones have had lithium ion batteries for much more than a decade and they very rarely if ever go bad (Barring the Samsung galaxy event). So don’t write off the tech just because some potentially dodgy battery went bad and caused a stuff article.

Additionally, I think it’s worth learning about LiIon chemistry in general and understanding what is harmful to it: high temperatures; charging under low temperatures; leaving them very full or very low for long periods of time. But really, if one purchases a good quality device, it comes with a management system that manages all these things for you. Unfortunately most people go for the cheapest option.