Charging Time for Earbuds : About 2hrs Voice-Controlled AI: Yes, Siri & Google AssistantBattery of Charging Case : 2200mAh capacity charging case provide about 17 times additional charging for 2 earbuds and use for emergency charging to any smartphone. Earbuds Specification :Battery Type : Lithium Polymer BatteryVoltage : 3.7V (under normal condition)Lifetime : ?300 timesCapacity : 45mAh + 45mAhTalk Time: Up to 8-9hrsMusic Playback Time : Up to 8-9hrsStandby Time : Up to 100hr Speaker :6φ mm