Parts of a mobile phone

Mobile phones have many separate parts that are required for them to do what we need.

LCD screen:	LCD (Liquid Crystal Display) screens are thin and require small amounts of electric power. That makes them suitable for use in a mobile phone powered by a battery.
Keypad:	The set of buttons and other buttons on the phone. Mobile phone keypads can often type both numbers and letters. When text messaging, the keypad allows the user to type in special characters such as punctuation marks.
Menu button:	A command button on a mobile phone that displays a menu. The menu allows you to access different functions on the phone, such as text messaging, games and the camera (if you have one).
Antenna:	A device which radiates and receives radio signals. Older mobile phone models had antennas that stuck out of the phone while newer mobile phones have them embedded within the case.	An older mobile phone model with an antenna
Battery:	A device that stores energy and makes it available in electrical form. The first mobile phone batteries were made of Nickel Cadmium (NiCad). They were environmentally harmful and had to be disposed of as toxic waste. They also affected information on the mobile phone if the battery was not fully used it before it was recharged. They also tended to lose their power quickly if they were not used regularly, and got spoiled when overcharged. The second generation of mobile phone batteries were made of Nickel Metal Hydride (NiMH). They contain no toxins and are more environmentally friendlier than NiCad batteries. They do not need to be discharged fully before being recharged, but overcharging will also affect the life of the battery. They have a higher power capacity than NiCad batteries. Lithium-ion batteries are long-lasting rechargeable batteries that are commonly used in mobile phones today. They have a far greater energy capacity than NiMH batteries and do not have to be discharged fully before being recharged.
Microphone:	A device that picks up and converts sound energy into electrical energy, which can them be amplified (made louder).
Earpiece:	Also known as earphones, car-kits or hands-free sets, earpieces help mobile phone users talk and listen on the mobile without having to hold the mobile phone to their ear. This is especially useful for people who are driving or have their hands full.