I did the same. Added a magsafe compatible case. However, i also purchased a cheap magsafe desk charger and car pad.
https://www.amazon.co.uk/dp/B0BQM9464J
https://www.amazon.co.uk/dp/B0CQTLVLGL
These both work fine with the case.
As the battery lasts all day and being able to throw onto the car...