Yes, you can use Sony MBH20 with any Nokia mobile phone.
Sony MBH20 comes with Sony battery only. As per company, it offers up to 100 hours of standby time and about 7 hours of talk time.
Yes, you can.
No. You cannot change the battery of Sony MBH20. Sony MBH20 comes with in-built battery.
Yes, You shall receive USB Cable for the same as part of the standard packaging.