I'm trying to repair some tool batteries. I think I identified the faulty part. It's the one with a hole burned through the middle. Can anyone help me identify what it is, and maybe point me to a supplier? If it's not clear in the pictures the numbers on it are 6358 and gv8619. I tried just googling the numbers but didn't find anything relevant. Thanks.

 

Appears to be identical to the other two, can you see a number on them??

 

those are obviously power mosfets. the silkscreen also shows Qx label next to each of them. this looks like one of SO8 variants, (Power-SO8 or whatever) with pin4 being the mosfet gate. something like this:
https://www.mouser.ca/new/onsemi/onsemi-nvtfws002n04xm-mosfet/
or this
https://www.mouser.ca/datasheet/2/196/Infineon_ISC165N15NM6_DataSheet_v01_00_EN-3569911.pdf

those packages are commonly used on mosfets for high current and low to medium voltage.

logo on the transistors shows A inside a circle. that is Alpha and Omega. https://www.aosmd.com/

pretty sure "6358" is actually AON6358

 

and it is a low cost item, easy to find:
https://www.digikey.ca/en/products/...58/5323034?s=N4IgTCBcDaIIIHkByA2AzAVgBwgLoF8g

 

Thanks for the quick replies. This is exactly what I needed.