Cristian M.wrote a review of Campagnolo EPS V4 Power Unit Charger on November 13, 2019
Familiarity: I've put it through the wringer
I hate to give anything Campagnolo a bad review since I love Campy and all of my bikes have Campy. However, this charger unit is utterly ridiculous. Campagnolo vets know there are quirks to this brand, but my god--it is sometimes impossible to connect this without bending the 4 pins inside of the cap that goes into the charging port of the group's interface. I know of people who are on their 4th unit because this seems to be a common issue.
Perhaps Campagnolo will address this issue on their next iteration, or perhaps they won't.