Don’t use your smartphone while charging it

“Ever wondered why phone manufacturers make such short charging cables? Do they want to save money? No, the answer is — They don’t want you to use the phone while charging. Yes, they discourage the idea of simultaneously charging and using it, as it reduces battery life to a large extent. Most phones run on Li-ion batteries and these batteries have a limited charge cycle after which they need to be replaced.” 

https://gadgetstouse.com/featured/drawback-simultaneous-use-charge/33587