I am writing this review after one month of usage. Syska power pro 200 is a nice product. I have tested it completely. It gives you 15000 to 15500 mah of power to ccharge. And it takes 10-11 hours to full charge the power bank. Build quality is also very nice with soft touch feel.
A good value for money product gives good battery backup but after 8-9 months it's charging speed slows down and it's usb charger is not good enough so using other usb chargers would be much better than the provided one.