desktop computers introduced in 1995, laptop computers introduced shortly after but both nearly got replaced by i pad and i phone that introduced in 2005
now in 2015 we have cloud memory but have security and privacy problem
current electronic devices has two main problems, one is memory the other is power the third is connection
i pad and i phone serve the mobile globe traveller and youth, this year i pad introduced keyboard and smart pen version with a bigger screen which covers and transform to a laptop on the go
a mobile and computer consist of input and output units
input unit is the keyboard, the mouse and the trackpad and the on off switch and home button
output unit is the sound system and display unit for playing audio and video and for showing photo and text
connection units is the ports, hubs and cables
memory and the power units
2015 introduced a new battery invention that batteries can recharge instantly but with one year totally rechargable life time only
for memory for every device there must be at least two memory card slots for micro sd and there must be no upper limit for supported memory card size
batteries for devices must be easily replaceable
for batteries simply use external batteries like current external back up batteries pack
key is to make official batteries phone cases, the phone case and battery is all in one when we change the battery, we just change the phone case.
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