Ambrane is also very nice company in powerbank I have used Ambrane 10000mah power bank for my personal use.and I am fully satisfied with this company.Ambrane makes nice powerbank which gives is enough power to charge our device 5 to 6 times a day.the final power which is given or which a user can use is 8000mah ( approx.) .and remaning power is wasted in transmitting or charging other electronic devices.I like this company .and everyone should go with this powerbank which comes in great budget price.
Thankyou