mophie Powerstation Reserve with Micro USB Connector (1,000mAh)- Black

I took the time to evaluate this product thoroughly and I think a lot of the reviews on here are not doing it justice. I had some problems at first with this product like a lot of you on here but it turns out that those were due to me using it wrong/missing instructions. First of all: Mophie customer service is great! I did not try to contact them through Amazon but went directly to their website where they have a live chat. I got hooked up with somebody right away. All communication with them was fast, friendly and efficient. But back to my experience.I have a Samsung Galaxy S3 and was looking for something that can give me some juice when I am in a pinch, e. g. very late at night when I am at one of my sporting events. I do not want to carry a charger and cables around with me all the time. I got a spare battery, but you have to remember to take it with you ;). Which I probably would e. g. for a long trip with no access to an outlet but for sure I won't have it with me on this occassional emergencies to tie me over for a few hours. I wanted something I will have with me all the time which is not too bulky. So the key chain battery sounded like a great idea. I did not expect that a 1000 mAh battery would give me a complete charge (the Galaxy S3 hat a 2100 mAh battery and there is always some loss if you transfer energy from A to B). I expected something around like a 30 - 40% charge from this.At first I had some problems. My boyfriend tried to use it and did not realize that the two cables were really only one cable. One end has the USB plug the other end has the micro USB plug. You always have to have one end of it plugged into the mophie or it won't work! So that might be the answer to some of you who said you got 0 charge out of it. That is what happened to my boyfriend. Once I pointed out the cable issue, it charged his phone fine (HTC).I tried to charge the mophie with the wall charger that came with my phone. It has a USB port. It seemed to charge the mophie fine judging by the light indicators, but I got only a 10% charge out of it. That is why I contacted Mophie. They told me this is not normal and sent me a replacement very quickly. Naturally they covered the shipping costs. I was extremely pleased with their customer service.The second device seemed to work better right out of the box. I charged it again through my wall charger and again it did give me only a very mediocre charge. Naturally I was very disspointed but not ready to give up. I then charged it via the USB port of my laptop. And this made a huge difference. Now to those of you who complained that using the USB port on a computer does not work when the device is in sleep mode: That is not the fault of the mophie. If your computer does not provide power to the USB port while in sleep mode, nothing can charge off it. What is bad though is that when I used the wall charger with usb port the mophie said it was charged (green light) but in reality it was not. That is a flaw. Plus, the device is too fickle in regards to how it can be charged. To use the wall charger would be more convenient. But I guess you do not use the mophie every day so charging it via the USB port of your computer is not such a big deal. Anyhow, I substract one star for the false "green light" indicating a full charge when using the wall charge and the inconvenience of not being able to charge it this way.Some people here wrote that the device needs a flashlight. Really? Every smartphone has a flashlight app nowadays. Plus, it would make the device probably bigger not smaller. Which brings us to the size: It is a tad big for a key chain fob but still managable. I got rid of all the unnecessary stuff on my key chain ;). And one more tip: Do clip the mophie to your key chain in such a way (e. g. by using a second ring) that you can take it off easily. That way the weight of your keys is not an issue when you want to charge to or from the mophie.Summary: This device is meant to give you emergency juice in a pinch, is easy to transport and hard to forget. And it does exactly that.Negatives: A tad big, instructions on how to use it could be better to avoid the problems I described above and which many of you experiencedPluses: It takes a very short time to charge it up (about 1 hour or 2) and it charges your phone very, very fast. Much faster than the wall charger that came with my phone. So that is ideal for the emergency situation. It is easy to take with you and it works as a key chain fob if you follow my tips above. This ensures that you have it with you when you need it.I will update this review shortly to give you exact number on how much charge I can get out of it for my Galaxy S3 and the exact charging times. So far I just used it to charge my phone from 80% to 100% and there was still some charge left. I want to drain it completely and test it again.

While I like the product, it has a few draw backs. My biggest problem is with the connector to the phone, it slips out often. The product charges fast and gives a lasting charge to my phone, but the phone connection is not tight enough and will slip out just enough so that it stops charging, and I only can tell that it's no longer connected by looking at my phone. But if you can keep the connector in, it does it's job.

The website already specified that Samsung S4 (my phone) is not part of the device list compatible with this item, but I would expect it to charge since the item is compatible with the S3. I apologize if I am being ignorant about the fact...

I should have listened to all the poor reviews before purchasing. This unit is simply not strong enough to give my Galaxy S3 a boost. I got it to give about 8% max, which it should provide about 40% or so. Returned it to mophie who sent me another unit. That unit also performed poorly. Returned that unit to Amazon for a refund.May work on an older phone with a much smaller battery.

Too big, sent it back.

coming from mophie this looked like a good quality product, but sadly only after having the chance to use this for about 3-4 times to save the dying battery of my S3 this has become useless. this charges now for 3-4 secs before dying out and then charging is complete before you know it without actually charging it.

works great it has given me up to15 hours on my phone

This is great for people on the go who need to get there battery charged and don't have a plug in near by. I got this for my wife a d she loves it.

Ordered it for comparison testing with another product. It did not live to my expectation - run time is lower than expected.

Would charge other things but even with the correct adaptor it wouldn't charge an Iphone 5. Obviously not quite enough power.

Has stopped working after just one charge. Not impressed. 0 stars if I could.

Purtroppo il caricabatteria non funzionava ma comunque e' molto bello e comodo ho gia' avuto lo stesso articolo ma adatto ad iphone (questo e' per micro usb ) e funzionava benissimo come riserva di emmergenza non arriva a meta' ricarica ma e' piccolo e leggerissimo sempre disponibile agganciato al portachiaviComunque problema risolto in pochi giorni

La compre para cargar mi antiguo iphone 4 con el adaptador original y me funcionaba bien. Pero ahora tengo un iphone 5S y lo pongo a cargar y al principio bien pero luego es como si se gastase la batería. no se si es por el iphone o porque. La marca me gusta y es buena. Pero no se porque me sucede esto :(