I only got 1. 5 battery charges out of ...
594145
I only got 1.5 battery charges out of a full charge on the battery. I hope thats incorrect.
1030358
I guess I was unlucky and got a battery that only lasts 1 day. Granted I'm glad it lasts the entire day I expected it to last a lot longer due to its size and weight. Going through the return process was difficult and complicated to say the least. Also make sure you follow the rules in charging the battery and be prepared to charge the battery in the middle of the day because you need to charge then let it die down to about 2% then recharge it 5 times... wish they did that in the factory before they shipped them.
2625410
Only charges to 66%. Instructions say do not let battery get down to 0% charge. It was delivered at 0%. It then was charging nicely but stopped at 66%. Too bad for me because I have 2 laptops and now have to find another product for the second one. Maybe it was just mine that was bad. I am not saying that all the batteries are bad but unfortunately mine is virtually useless.
If anyone knows of a better product please let me know,
1429405
I don't know its supposed to work like this, but the thing never fully charges my battery. If I charge it from say, 20%, it will go up to about 40-50% and turn off. I have to unplug it or take the battery out then put it back in for it to charge some more. I'm not really complaining though, the price was dirt cheap and I only use it as a back-up charger.
1480365
I'm usually pretty good about reading the experiences of others. That's one of the great things about the internet, the consumer has a fighting chance against gotcha-capitalism. However, I missed out seeing all the 1's, unfortunately, this time. Anyway, out of the box it worked fine. The next day, no, so I took out my rechargable batteries and put in duracell after my battery meter told me that the they were only charged to 1.0 volts rather than the 1.5 volt of a normal battery. O.K., the next day good. Then no good on the third day. That time I poked and prodded and finally got it going again. Now, it's "no" again. So, I got my meter and measured the duracells and they show 1.0. New, they are 1.5 volts. I put in 2 more duracell AAA batteries and it's working again, except now I will remove those batteries and plug my wired mouse back in. 6 batteries used in 1 week is just too much. Pitiful design. How can they live with themselves.
91121
The charger charges my Samsung battery to 100% but not the 2 batteries that came with it. After 18 hours on the charger I only get 93% on both of them. They do seem to hold the charge for a similar amount of time.
3987564
I charged this battery for about 5 hours then put it in my camera. After taking 1 test picture, the low battery meter on the screen started flashing. I removed the battery and replaced it to make sure I had it in there correctly, (yes there is only one way it will fit in there, but I checked anyway)  Again, the low battery came on immediately returned. I switched to view mode and then the battery died.

A day or so later, I recharged the battery again for a few hours and tried again with the same results.

I went on the Amazon site to send an email to the seller. I told them what the problem was. They did reply in a timely fashion, but all they said was to recharge the batter and try again and they close out the complaint. I'm going to go in and complain again. We'll see what happens.
2911943
Edit: Originally I gave this 5 stars, but the 2.1amp port malfunctioned and does not work. I was able to get a replacement under the warranty but my replacement doesn't even work correctly. Yes it charges, but it is not a fast charge output, even with different cables that are rated for fast charging. Kinda sucks needed it plugged in for 2-3 times longer when the battery should just function normally in the first place. So I've noticed a lot of other people had problems with the 2.1A output port as well. The QA for this company must not be good. My battery also makes a white noise sound when charging. I've also noticed this battery does not hold a charge as well as it has stated. I should be able to get 3 or 4 charges out of the battery but only get 1-2. I may just shell out more money for a better charger next time.

Works perfectly and comes in handy. I 3D printed a custom clip so it attaches to my phone easily. I can charge usually about 3-4 times before I need to recharge it. The fast charge port helps a lot. Great portable battery for the price.
521145
I can never seem to get a full charge on my battery. It works great but the I can really only get one, max, one and a half full charges on my iPhone 5s when it's dead. The three LEDs never light up. I can charge it all night and only get two LEDs lit up (which according to the manual is 33-66%.) It's great because it does what I need it to do. I'd like it a lot better if it would fully charge so I can use it for the day but I find myself needing to find a place where I can charge up my charger about 2/3rds through the day. At that point, I may as well be just charging my phone.
3106262
Doesn't full charge my battery.  Almost half and that's is not good enough.
403358
I wish the item had worked better, but died after charging only 3 batteries! I may have just gotten a faulty unit, and I don't blame the vendor, just not worth it.
3698197
I ordered two of these - only one works!  And I don't seem to get the same amount of recharging power as I get from a different brand of charger.
1313057
The battery only last half as long as it should it says 4 hours even full charged  I only get 1.5 maybe 2
344864
i charged this thing for about a day, next day, used it for about 5 minutes and the battery was all drained.
4879135
Got my battery, went in fine. Did the proper battery cycling, but it won't fully charge to 100%. Only 99%. And it doesn't seem to last as long as the stock battery
1200637
upgraded from one star to two, since this may not have happened to everyone who bought this item.  got the battery and it fits my studio 1745, but does not charge.  came with 67% charge.  I tried unplugging the laptop to see if draining the battery some would prompt it to charge, but no go.  Also, it drains incredibly fast.  at 67%, my computer indicated the charge would last only 1 hr 8 minutes.  had it unplugged for about 10 minutes, maybe less and it dropped to 47%.

Maybe it's just from a bad batch.

Now I have to go to the hassle of returning it and shopping for a new battery for my laptop.
333852
After about a week, it would only charge my batteries enough to where they only worked for 5 minutes or less.