Anker PowerCore II Slim 10000mAh Power Bank

UPDATE (9-12-17) I was contacted by Anker on the same day I wrote my initial two star review. Sharon, from the Customer Service Team was great. Through email communications and my testing the battery with a different cord, we resolved that it was the cord that came with the battery that had the problem and not the battery it self. Anker was willing to send a new battery if it turned out to be the battery but it wasn't. Not only did I receive a replacement cord I received one that was longer and better in their line of cords for absolutely no charge! That's what I call stellar customer satisfaction! I am happy to say that I cancelled the return of the PowerCore II Slim 10000 battery and it is a pleasure to use and has awesome power. It fits nicely in my purse and it is so light that it doesn't weigh my purse down. I would highly recommend if anyone has a problem with this battery or any other product by Anker to work with them and allow them to make it right... they will. Five stars all the way!! Thanks much, Toni **************** I waited and waited for this battery to shipped from a deal of the day price in August. Received it today (9-6-17) and it is defective and doesn't work. I own three Anker cell phone stands and one Anker portable battery so I was very disappointed when out of the box this battery would not charge. All it did was blink on the first light all day long. I switched to a couple of adapters and different sockets in my home to no avail. I received a dud and back it goes. Could the deal of the day price be associated with receiving a defective product? I sure hope not, but a number of people have complained about this battery in the reviews so I'll continue to use the Anker 5200 Mah I currently use. It's perfect, charges quickly, light weight and I've never had a problem with it.