LAS VEGAS — Put this tubular object in your backpack, and you can generate juice for your cellphone — just by walking around.

The nPower PEG (short for “personal energy generator”) contains a weight, a spring, some inductive coils and a battery. Put it in your pocket or your backpack, and it wiggles around with your body’s natural movements. As the internal weight moves, it generates electricity in the coils, which gradually charges

LAS VEGAS — Motorola and LG are going head to head with phones that they claim are the fastest in the world.

Motorola on Wednesday launched the Atrix