Cell phones are one of the best innovations of the past decade. They have ushered in an era where anyone can be connected to others, anywhere, anytime. Text messaging has become a fad, not only among the youth but also on the corporate level. There is hardly anyone without a cell phone these days.

And as it is with technology, the cell phone has evolved in many ways. In fact, it may be the fastest evolving gadget there is, with new models being introduced to the market within just a month of one another. Aside from sophisticated gaming capabilities, most phones now feature Internet browsing via WAP, video and photo cameras, radio and MP3 players. Some even have the functions of handheld PCs, allowing word processing and presentations. All these extra applications use a lot of power.

Most cell phone batteries are Lithium Ion (LiOn)