Xiaomi Mi Vacuum Cleaner G9 G10 battery dissasembly red led accu broken. I don't know how to fix

Hi. I disassembled a working g9 battery that had batteries for 3 minutes. I exchanged for other used charged cells (tip - each weld can be removed by drilling it gently with a 1.5mm drill bit on each link 4 places per side). The vacuum cleaner worked for a week and then it does not want to charge and the red LED is on or blinking. It turned out that one cell died and had 0.3v I bought new SANYO 2300 mah cells, charged and replaced but nothing has changed. Still blood red. The charger is working. He writes, maybe it will come in handy. I hope that you will manage to figure it out because I¬ that good at electronics. Let me know if buying a new original battery helps if it is not a failure of the vacuum cleaner. The Xiaomi G9 and g10 vacuum cleaners are compatible with the Dreame T10, T20 and T20Pro battery. I bought it and it works, so I recommend it.