The Tescom DC UPS 18W provides instant power to your devices in the event of a power outage. This device smooths out fluctuations by protecting against sudden increases in power voltage while featuring a lithium battery with a significant energy reserve. It powers all compatible devices (Smartphone MP4 and others) and at the same time can charge devices via USB port (5V/ 2.0A). It is extremely convenient as it features an LED indicator that displays the remaining energy levels (in increments of 25% 50% 75% 100%) ensuring that you maintain control at all times.