Samin is another good brand which one should consider when buying a power bank and the 10000mah will enable your phone to last much longer. It comes with 10, 000 mAh battery capacity. Samin uses Lithium polymer battery in this power bank.Which is just like provided in mobile batteries with auto shut down.Li-Poly battery is superior and retains charge for weeks. It also supports fast charging and will be able to charge your devices quickly.It has dual port and charge indicator.A high quality product must to try and see the difference.