Double E Portable Battery : Just Shake It!

Double E Portable Battery : Just Shake It!

Smart phone can suck the life out of its battery pretty fast, that’s why most people often carry extra battery for charging on-the-go. However, what if even the extra battery is dead? That’s why it’s better to have a reliable self-charging extra battery. Double E is a concept portable battery designed to solve that issue, […]

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