One Plus Buds 3: Type of Battery: Li-ion rechargeable battery Earbud battery capacity: 58 mAh 520mAh is the battery capacity (charging case). Getting charged Features of the USB Type-C earbuds interface Type of Connection Version of Bluetooth: 5.3 Bluetooth Codec: SBC, AAC, and LHDC Protocols of Transmission: HFP, A2DP, and AVRCP Time frame Playback (AAC, 50% loudness, ANC off) Ten hours with earbuds 44 hours of playback (ANC on/transparency mode, 50% volume, AAC) with the earbuds and case 6.5 hours with earbuds 28 hours of playback (ANC off, 50% volume, LHDC) with earbuds and case 7 hours of earbuds 30 hours of playback (ANC on/transparency mode, 50% volume, LHDC) with the earbuds and case 5.5 hours with earbuds Case + Earbuds: 24 hours Talk Time (HFP, 50% volume, ANC on/Transparency mode) Calls: up to four hours (earbuds only) (ANC off, 50% volume, AAC) Charging Earbuds: two hours for ten minutes Case + Earbuds: 10 minutes for 7