Do you own a Dyson v7 Animal cordless vacuum? 

Does your battery work fine on normal mode but wont run on Max mode?

Well your battery is fine, its just Dyson fucking you over.  

Thankfully the internet is awesome, and a Dev built a firmware to upgrade their battery management system.

Here is the repo that also has a youtube tutorial. 

Jailbreak your Dyson at your own risk

Do you own a Dyson v7 Animal cordless vacuum? 

Does your battery work fine on normal mode but wont run on Max mode?

Well your battery is fine, its just Dyson fucking you over.  

Thankfully the internet is awesome, and a Dev built a firmware to upgrade their battery management system.

Here is the repo that also has a youtube tutorial. 

Jailbreak your Dyson at your own risk

https://github.com/tinfever/FW-Dyson-BMS