Most small LiPo batteries from any online retailer normally ship with a built-in over-voltage protection IC between the battery leads. I'm working on a single cell LiPo charger circuit and I wondered if I could just integrate that same protection circuit onto the charger PCB in case the end user attaches a battery that doesn't have one installed.
My questions are:
1) If the user's battery has the protection IC already installed and then attaches it to the PCB with its own protection IC, would having the two safeguards be redundant or interfere with each other in any way?
2) Is it a bad design practice to have this kind of a backup system if most batteries already have over-voltage protection built-in?
I couldn't find if anyone asked any similar questions before. If someone has asked before, please link them. Thanks!