Where is the fuse in the bat.

[rdchinoy]

So I purchased the best brand and quality 18650 LG2 dark brown Bats. 9 of them.
I then rebuilt my 9 cell bat for my Lenovo W520. Making sure to charge all the cells. Before I put them in.

The pack worked but refused to charge.
Further research lead me to a video where the speaker talks about a fuse in the bat.
If the voltage of the pack falls below a certain voltage (Like when you cut out all the old bats). or the old bats values fell too low.
Then the bios on the bat blows a fuse. He says the only way to fix this is to replace the fuse.
Anybody have a pic of where this fuse is ?. Or is he talking about a s/w fuse. If he is talking about a s/w fuse then how do you re-set it ?.

Thanks for any info you may have.
One of the videos I watched.
https://youtu.be/_9ErnoLVxCA

[axur-delmeria]

Post decent photos of the battery pack's circuit board.