identify component in li-ion battery circuit

OOPs.  well sorry this is a NI-MH battery circuit not Li-ion

Best guess thats a diode... Can you share the image?

I can't figure out how

I think I figured it out, I belive the photo is in review

I think I found out that it is a thermal limiter  I was mistakely searching for the numbe 8 instead of letter B  the part is TB08-BB8D. I'm not sure why this would cause an issue. I have drawn a circuit diagram. Be easy I'm a beginner LOL.  so as I stated in the beginning the positive side of the DC jack shorted againnst one of the battery groung straps and it stopped working. I replaced the batteries and wired it as it was and the motor worked fine till i plugged it in to charge, Then nothing the batteries are dead.  So what do you think I need to do to repair this. The theromal limiter is closed at the moment  TY Mark

I also drew a diagram of the circuit, it is in review also  TY

The three primary functional components of a lithium-ion battery are the positive and negative electrodes and electrolyte. Generally, the negative electrode of a conventional lithium-ion cell is made from carbon. The positive electrode is typically a metal oxide. The electrolyte is a lithium salt in an organic solvent.

Maybe it is a battery charger module board or inrush current limiter, waiting for the images.

The three primary functional components of a lithium-ion battery are the positive and negative electrodes and electrolyte. Generally, the negative electrode of a conventional lithium-ion cell is made from carbon. The positive electrode is typically a metal oxide. The electrolyte is a lithium salt in an organic solvent.