The low-battery icon has become a symbolic image of how smartphones have developed. Yes, our cellphones have come on in leaps and bounds since the humble beginnings of the Nokia 3310. But there is one department in which we have lacked going forward – battery life. This problem, though, is soon to be one of the past – as a company called Dark Energy is making it possible to not have to plug your phone in for a whole week.

Dark energy have produced what they call a ‘reservoir’ – an iPhone-sized block of pure energy. Well, not really – you have to fill it up with energy first.

You simply charge the reservoir, bring it with you on your travels, or your camping trip or to a festival – plug it into your phone and BOOM – power. The reservoirs can reportedly last up to a week, and can plug into anything with a mini-USB port (phone, tablet, camera, music device).

You can expect an adapter for the lightning connector pretty soon, too.

[Source : ThinkWingMan]