Why do MOBILE BATTERIES have THREE terminals? A simple Explanation.

Donate: BTC:384FUkevJsceKXQFnUpKtdRiNAHtRTn7SD ETH: 0x20ac0fc9e6c1f1d0e15f20e9fb09fdadd1f2f5cd In this video I am conducting a simple experiment that demonstrates the purpose of the 3rd terminal in cell phone Li-Ion batteries. https://www.seevid.ir/fa/w/Sb4aVHoeo90 The rule of two wires in electronics. https://www.seevid.ir/fa/w/Sb4aVHoeo90 How is mobile phone powered? https://www.seevid.ir/fa/w/Sb4aVHoeo90 The purpose of the 3rd terminal. https://www.seevid.ir/fa/w/Sb4aVHoeo90 Change of resistance. https://www.seevid.ir/fa/w/Sb4aVHoeo90 Powering the phone from an external supply. https://www.seevid.ir/fa/w/Sb4aVHoeo90 Why are 3rd party batteries dangerous?