Some popular charging cards widely accepted in Europe:

1. NewMotion: NewMotion is one of the largest charging card providers in Europe. They offer an extensive network of charging points in various countries. With the NewMotion card, you can access both public and private charging points. They also provide a convenient app to find charging points and manage your charging sessions.
   
   

2. Eneco eMobility: Eneco eMobility is another well-known charging card provider in Europe. They have a large network of charging points spread across multiple countries. With the Eneco card, you can easily find charging points and pay for your charging sessions.
   
   

3. Plugsurfing: Plugsurfing offers an international charging card compatible with a wide range of charging points in Europe. With the Plugsurfing card, you can find charging points, pay and manage your charging sessions via their app.
   
   

4. Chargemap: Chargemap is a popular charging card provider that offers a large network of charging points in Europe. With the Chargemap card, you can find, navigate, and pay for charging points via their app.

When choosing a charging card, it is important to check if the card is compatible with the countries you plan to visit. Additionally, prices, rate structures, and coverage can vary between different charging card providers. It can be helpful to compare the specific details, costs, and conditions of each card before making a choice that best suits your needs.