Yes. Headphone (a) supports fast charging.
With a 5-minute charge:
ANC off: up to 8 hours of playback
ANC on: up to 5 hours of playback
Test conditions:
Battery performance is measured at 50% volume using the AAC codec, under controlled laboratory conditions at Nothing’s internal testing facilities (25°C / 77°F). Actual battery life may vary depending on volume level, audio content, output source, environmental interference, enabled features, and individual usage habits.