If you are currently using Samsung's Galaxy S4 phone and are worried about its battery life, perhaps the latest EnerPlex Surfr solar cell phone back cover can solve your problems. It has a built-in battery and can use the back of the flexible solar panel to charge the battery.
EnerPlexSurfr back cover has a variety of colors, built-in 2500mAh battery, while also considering the protection of mobile phones in the design. Its built-in battery can be charged using a USB cable or a flexible solar panel behind it. The back cover measures 5.7 x 2.9 x 0.75 inches and weighs 104.5 grams.
The phone case has a small window on the front of the phone that allows the user to easily view the time without opening the phone case. It sells for $89.99 and will begin shipping in mid-November.
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