I have been using this mobile accessory for more than a month already and it has proved its worth, not only for taking selfies, but also for taking food shots.
The Protools Selfie ring light is rechargeable through USB port. It can provide light of up to 4 hours, when fully charged. Plus, the brightness can easily be controlled by pushing a button, and has three brightness levels.
And no matter what mobile phone you are using, it clips on perfectly!