i bought a portable 12,000 MAH power bank with 3 USB ports and it worked for like 4 months and now it will blink like its taking charge but it dont it will start to charge my phone and within 5 minutes it will b off with battery dead i had it on charger for over a day already and it still starts at the bottom of the led lights and blinks the whole way up and still same result i have been messing with this think for like a month now and cannot get it to charge i guess from what i read im just screwed huh? all i found is a 3 month warranty when all your competition has 18-24 month warranty