RAVPower® 23000mAh External battery pack Multi-voltage 5V-20V for smartphones, tablets, netbooks, laptops (Electronics)
as a nearly inexhaustible source of energy that accompanied me not quite small Wicht almost anywhere. you can easily make a week 2 phones, and 1Kindle 1MP3 player in normal daily use in order to reload and still has capacity over. Even my Lenovo Yoga