WhoDatSniperI bought mine 8 months ago and it already stopped working, the anker. And I only used it to charge my phone once a day, sometimes twice and sometimes not at all. Always kept track of the power level and charged accordingly. Now it shows its full power but doesnt output. But it was only $30 so Im not really mad, just saying, its not the best either. Not to mention it didnt even fast charge my phone :p
clowndocAnker makes quality ish. I have a 10,000 mAH I've brought and used extnesively on cycle touring trips to Scotland, Canada, Spain and around California. The backplate fell off long ago and I can't remember what happened, so the PCB is exposed but whatever, it can get damp, has gotten damp I should say (Scotland is "damp" to say the least), and works fine. I bought in 2015 and it's still on my desk, I used it just yesterday.