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![[Trend Micro Infographic] Getting Extra Mileage from your Smartphone](http://mhisham.org/wp-content/uploads/2012/06/Trend-Micro-Infographic-Getting-Extra-Mileage-from-your-Smartphone.jpg)




It is true that over usage of applications can easily decrease your battery but you can’t avoid it because smartphones are very useful specially when you are traveling. This is the reason why many companies developed an extended batteries that you can use to prevent this kind of dilemmas.
Early telephones used a single wire for the subscriber’s line, with ground return used to complete the circuit (as used in telegraphs). The earliest dynamic telephones also had only one port opening for sound, with the user alternately listening and speaking (or rather, shouting) into the same hole.