Two points of failure for us to improve on is better than only one. But I still think it’s poor for the coroner to not mention all of the other factors that could have individually prevented this.

Using the wrong charger should (ideally) be something that any big battery pack can survive – every big battery pack should (ideally) contain protection circuitry that shuts it off when abnormal conditions are detected. But I know this gets omitted (it costs a few dollars) and it’s something we need to change.

Hear, hear. The battery should absolutely not be exploding if you use the wrong charger. It should just switch off and fail to charge. And I think any battery which doesn't do this should be illegal to sell or import into Australia. It's basic consumer protections.