Hello, I use a samsung galaxy note 4, I just got a powerbear replacement battery(the red one), and I started using it right away and allowed it drain till it went off and then I charged it till it hit 100% , now I put it on to use and am on the phone say 2hrs, it drains to 60% , does this mean there is a problem with the battery? Did I get the charging cycle wrong? Or is the battery not reliable? What can I do to ensure my battery lasts longer and doesn't drain fast? Please I need your help urgently, as my samsung galaxy note 4 is both my personal assistant and my work place. Thank you.