TAkes forever to charge
343042
The orange light blinks on and then off and it takes a whole day and then some to charge.  I think it may be defective but I'm not sure.
3873265
It takes a long time to charge, and it doesnt charge my phone to 100% it dies before it does. Doesnt last as long as it says it does.
761080
It takes forever to charge but when you are in a bind it's all you have so why not.
1199717
Bought this so I could be on my phone while charging it in bed. It worked, but the cord was so long that it took so long to charge my phone (like 4 or 5 hours for iPhone 4s). Finally bought a 6 foot charger and it works so much better.
935135
its generally not bad but on the other hand the charger and charging system it ridiculous. it takes forever to charge and i have to set the charge in an awkward position for it to charge.
4200922
The product took longer than anticipated to arrive.

When i received the product i put it in my pebble blue S3 and plugged it in. The phone said it was charging immediately. However it hovered on the same percentage for over 15 minutes before it went up one point. I tried different cords that all work with the phone and original battery. I even tried plugging it into a computer usb port. It took over 7 hours to charge the battery no matter what i tried.

When i could finally use in the phone where it said it had 100% charge it lasted for less than 2 hours of use (angry birds type game) and 12 hours of standby time.

The original battery has done all of that and would still have 50+% available if not more.
2502689
I have to move my phone around so much to get it to work.  It generally takes 3-4 times before I get it to start charging.  For me, it is easier to plug it in to charge than take the case off.  That is just crazy to have to take the case off to charge it.  What is the point.  I did contact manufacture, because I got an email saying to if you have issues, and they told me I need to contact amazon.  You get what you pay for and at $10.00 it is not worth the headache, and I guess that is what they count on.  I would not recommend this.
3867575
I do not if my product is bad, but it takes forever to charge my phone even if it's the only thing connected to it.
1387479
I was looking forward to this charger to a cheap one I got from Ross which overcharged and died. I was excited about its size and because of the lights that let you know how much power it has left. Nevertheless, this has been more disappointing than its Ross counterpart. First, it takes way too long to charge itself! While Ross counterpart charged in almost two hours this little guy takes more than four hours. The worst thing is that it still doesn't charge my Galaxy S5 to 100%, while its Ross counterpart did it once and got it back to 60% for before it died out. I think this little guy will work for a while, but I would not purchase again and will use in a less regular basis to avoid the hassle of charging it.

UPDATE!
The seller immediately got in contact with me and issued a full refund for this product. I am amazed at this high quality customer service! The battery did get better with time, though it still takes way too long to charge! It does, however, give more power to my phone.
1000721
Even though the packaging and listing stated charging time of an hour with usage time of 4 hours, we have not been able to get the device to ever indicate fully charged or work without a constant power connection.
4337354
Charges very slowly. I will have my phone plugged in all night, and it is still not completely charged in the morning. I would give it zero stars, but it technically does work, just very poorly.
119354
Great concept,  but this is absolutely the SLOWEST charging option ever created...  The phone actually loses more battery life than it can be charged....  So disappointed in my purchase.  I recommend looking for another brand.....
571711
The portable charger takes forever to charge. I leave it to charge overnight and still not 100% for me to charge my phones during the day.
4284135
They are really cool looking but they take forever  to charge a phone.  Just wasn't worth it,  i had to return them
2180359
It took five hours to charge the thing up and now It's very slowly charging my iPhone 6s up. It was on sale because it's been discontinued. Hopefully the newer model can charge gadgets up faster. I really can't recommend this portable battery charger.
4701444
This item charges other devices as it's supposed to, but to re-charge this charger, it takes 15 hours or more.
Just too time consuming.
1650376
Does the job, but like other reviews stated, takes FOREVER to charge. I tend to leave it over night (8pm-6am) if I know I'll need it.
Plugged it in when I got to work at 9 and when I got off at 4, it still hadn't charged fully. Maybe 80%?