You cannot change the battery of this headset.
Yes, It does have.
Yes, you can connect with Vivo Mobile.
No. You cannot listen music on this.
Samsung HM1350 standard packaging includes, Bluetooth Headset, Earrings, Clip, User Manual and Micro USB Cable.
Best Performance At This Price
It is good Bluetooth headset. Charges quickly and fits good in the ear. No problem in using while driving my bike.