Battery Safety 101: Anatomy - PTC vs PCB vs CID – 18650 Battery | BATTERY BRO
Liitokala New Protected Original Rechargeable Battery 18650 Ncr18650b 3400mah With Pcb 3.7v For Flashlight Batteries - Rechargeable Batteries - AliExpress
Is my battery protected
How to do a correct test and determine whether a 18650 li-ion is a protected or non-protected battery - Quora