Your headphones can get ruined if you use them in the rain only if they get in contact with the water.
Headphones do not use batteries, they use a power source such as an iPod or mobile phone.
Only apple cords, microphones, and headsets. But u can use any kind of headphones that u want.
No
If you buy an iPod, headphones will be supplied with it.
For the iPod Nano, Apple has designed a set of headphones that go specifically with it. The model is called EarPod and it includes a microphone to speak in.
You can use the headphones for something else; or give them to someone else.
You can use Normal PC headphones and speaker too and Iphone/Ipod headphones will work too
Yes
Yes, iPod headphones work in Blackberries, any headphones will work with a Blackberry.
Listening to music from an ipod/mp3 device.
It depends on the accessory. (ipod headphones, and some docking stations.)