Well done.
Have a question. Did you inquire about the price of the supplier's charger as a matter of interest?
Secondly, I am wondering if a 45 minute ride would be enough to charge the battery fully. With it's larger capacity is may not. Then again I know nothing about Lithium batteries and their needs. I am sure Alantf can add some info when he shows up later.
You do pretty well for a NOT a Mechanic and a Videographer.
Should be a "How To" for the uninformed to show how simple a battery R/R is. A big+ for adding the tools required.