It's unclear whether the company acknowledges there's a battery problem (although there have been reports that Apple is contacting iPhone 4s users to try to get to the bottom of it).

A microphone is cleverly hidden in the seam of the battery cover, above and to the right of the camera pod, and the speaker is located on the signature chin at the bottom of the device.

This I attached to the bottom wing and began to oscillate the wing using my battery charger as a power source.