Having smaller processors and LED lights allows the iPad to operate with no heat, this means you do not have to worry about your iPad over heating, or having your ipad burn your legs. During long durations of use. With the iPad running very efficient hardware it's ion battery can last any wear from 8 - 12 hours without needing any charge.
The most obvious thing you see inside are the two big lithium-ion batteries. But the most important thing is the logic board and its A4 chip, which is the microprocessor for this device. The iPad is like any other computer, be it a desktop PC, a laptop or a netbook – it has a microprocessor and its RAM, a video card of sorts to drive the LCD screen, a “hard disk” (in this case made of Flash memory), a power supply (in this case the batteries and their charge controller), and a couple of radios (for WiFi and Bluetooth). Its all been miniaturized and flattened to fit into the very slim case, but it’s all there.
When you turn on the iPad, it “boots up” by loading its operating system, which takes control of all of the hardware and delivers the iPad experience on the screen.
It would be fair to say that the iPad shot for the moon when it decided to produce the iPad. The technical challenges Apple overcame in producing the iPad would be worthless if people couldn’t see a need for what is essentially a larger and more powerful iPhone, sans phone capabilities. Think of the operating system the iPad uses — Apple practically invented an entirely new OS, called iOS 3.2.2. The challenge here was in creating an operating system with functionality somewhere between a Macbook and an iPhone. Core applications were rewritten from the ground up, and Apple was charged with the task of reinventing the way their computers operate.
