Can I use an e-bike helmet for regular cycling too?

Yes, absolutely. An e-bike helmet provides equal or better protection than a standard bicycle helmet for conventional cycling. The main trade-offs are slightly higher weight, potentially less ventilation, and a more substantial appearance. If you use both an e-bike and a conventional bicycle, an e-bike helmet works well for both—there's no safety downside to using a higher-protection helmet for lower-speed riding. The only reason to choose a standard helmet for conventional cycling would be if you prioritize lighter weight, more ventilation, or a sleeker profile for road riding.