A small portable device featuring timer, clock, and calendar functions, equipped with a simple and functional interface and a truly long battery life.

Learn how to make a simple lemon battery and use it as an emergency phone charger in this hands-on science experiment. Watch step-by-step as we cut lemons, prepare copper and aluminum electrodes, and ...

I changed 6 settings on my iPad to instantly improve the battery life (by hours) ...

After charging my iPhone the 'Apple way' for 2 years, here's the state of its battery now ...