And right through, the tech world has seen a plethora of innovations like development of USB Ports, Wi-Fi connectivity, 15,000 RPM Hard Disk Drives, Terabyte External HDD that can fit inside your shirt pocket, CD, DVD, BlueRay, thinner laptop, digital cameras, iPod, development of the mobile phone, smartphones that share the same features as the desktop PCs, Tablet PC and now Smart Watches.
Right through these 2 decades, battery technology made certain discoveries but they were never really implemented in to any mainstream products except for Li-Ion for laptop, cameras and mobile phones. This remained true for almost a decade. And the price of the Li-Ion battery fell by about 4 times but it still remains very high. Battery technology till now was struggling to keep up with the advances in hardware.