Help Which power bank to buy for Galaxy Note 4 ?

[Drake2k14]

Yo guys, I have Note 4 and I need to buy a power bank. So, which brand should I go for and how much MAH ?
Is Samsung power bank good ?

 

[jvook]

Estimate 80% efficiency so for note 4 3200 mah * 5/4=4000 Mah per charge. You want at least one full charge but the more you get the heavier it is. I use this onehttp://www.amazon.com/dp/B00CEZBKTO/ref=pe_385040_30332190_TE_M3T1_ST1_dp_1

 

[Drake2k14]

Estimate 80% efficiency so for note 4 3200 mah * 5/4=4000 Mah per charge. You want at least one full charge but the more you get the heavier it is. I use this onehttp://www.amazon.com/dp/B00CEZBKTO/ref=pe_385040_30332190_TE_M3T1_ST1_dp_1

Thanks a lot for the info mate .
I am also getting Anker.