[Dyson]How to repair "🔴RED LED🔴" Battery pack Dyson V7 triggerpro

A friend gave me a nearly new Dyson vacuum cleaner!
However, the battery flashed red and could not be used or charged, so I tried to revive it with the power of science.

※Note※
This video does not recommend disassembly or repair, as entertainment or as a show
I hope you enjoy the disassembly and repair process.
Lithium-ion batteries used in battery packs are very dangerous.
If you handle it poorly, there is a risk of explosion or fire, so please do not imitate it.
When shooting videos, we wear appropriate protective gear and take fire measures.