Gives my iPhone three and a half complete charges
356335
This battery has a highly agreeable price point.  That got my attention but also the color scheme with white and orange like a dreamsicle.  It's dimensions make otherwise look like a large iPhone 4.

This external battery has 3.52% of the power capacity than my iPhone 4.  That means I can, starting from zero charge in the iPhone 4, completely recharge 3.52 cycles.  That holds me in good stead for the types of trips I actually take, and I don't know that it's even necessary to bring the charging cable in my situation.

I recommend this battery.  The company, EasyAcc, is great about warranties and the battery looks and feels great.  I received a promotional unit and this is my fair and honest review.
732549
This charger will charge my iPhone at least twice and still have a charge even after letting my friend also charge her device too.
In good at recharging it at night of I've used it during the day so don't know how many charges but it wasn't halfway drained after all that use!
I keep it in my suitcase and it will hold the full charge when i haven't  used it for over a month.
3028940
This is a great charger. At first I charged my iPhone 6 Plus to 100% three times, plus I charged an iPhone 5 once to 100%. Charger is a little thicker than my iPhone 6 Plus and a little heavier too. I got a 3 cord to connect to my iPhone and can carry in my pocket together to charge. Works great.
3714212
I picked this up after my other freebie battery pack died.  When i first turned it on, it had 3 of 4 lights solid blue.  I went ahead and plugged it up and it took 8 hours before all 4 lights were solid blue.

I have an iPhone 6s Plus and this was my test.

1st Charge
Started charging at 9:55pm and the iPhone had 12% battery left
Went to bed at 11:30 and it was at 65%.
iPhone was fully charged when i woke up and the battery pack had turned itself off.  When I powered it on, it showed 3 full blue lights and the 4th light was very dim.

2nd Charge
Started charging at 7:30pm and the iPhone had 12% battery left.
iPhone was fully charged by 11pm with some minimal usage during charging.
Charging lights show 2 full blue lights and 3rd was dim.

3rd Charge
Started charging before bed at 38%.
Fully charged when i woke up and the battery showed 1 solid blue light and the 2nd light was dim.

4th Charge
Started charging before bed and the iphone had 10% battery left.
Fully charged when I woke but the 1st battery light was flashing blue.

I plugged the battery back in at 6:45am and when I came home at 3pm, the 1st light was still flashing.  I unplugged the micro-usb and plugged it back in and it appeared to be charging.  By 10:30, the battery pack was fully charged.

PRO's
Can charge 3 USB devices at once.
4 complete charges of iPhone 6s+

CONS's
Big (it is just a little bit smaller than my 6s+ and is almost twice as thick.  Not too heavy to keep in a backpack or laptop bag.
Takes a long time to recharge battery pack

Overall, I would purchase one of these again and will probably get a couple for some of my weekend trips.

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1579309
Did exactly what it indicated that it would.  Charged my daughter's iPhone 5 three full times.
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.
2985811
Good for charging my iPhone 6, fast even charges my iPad mini at the same time. Takes about an hour maybe two to get a near full charge on my iPad mini, about and hour and a half on my iPhone 6
327737
Very happy with it so far! Charging an iPhone 6 Plus and have been able to use it a few times before having to recharge the battery. It was also very important for me to have the visual indicator letting me know the remaining charge.
3470838
Very quality product that gets the job done. I am very satisfied.  It definitely will give 4-5 complete charges. I have an iPhone 6 Plus.
1006775
Ive told all my co-workers about it and bought 2 for my girlfriend and I. At full charge it will charge my phone 2 times over, an Xbox One controller, and have enough charge left to make an iPad get a few percents.

I work overnight at a Hospital, so its just in my pocket with my phone onmy belt charging.

I will say this though. Use the original MicroUSB it came with OR the USBs that goes to that individual device. 3rd Party chords aren't rated to bring on a full charge from it.
3775177
this is the best thing i have bought yet, lasts about 3 months on one charge and charges my iphone in about 45 seconds
686361
I love this device! I use it when I'm traveling, I can get about 4 complete charges on my iphone 6s from it.  Plan ahead and charge this device a day ahead of using it as it takes awhile to charge, but once you've charged it up it works great!
4563906
Properly charges my iPad and quick charges my newer iPhones (6s/+). I ordered 3, 2 work perfectly, the other allows some small current through the USB cable when no device is connected.
707285
I made sure to fully charge before using. It fits in my medium-small purses & is small enough to leave space for my phone, wallet, etc. Charging rate is slow compared to a wall socket or computer, naturally, but from ~10% on my iPhone 4S I fully recharged my phone and had enough power to give 11% battery to a friend's dead 4S; when I was recharged, I severely reduced the time I spent using my phone. A little disappointed the accessories don't include a converter for USB to wall socket, as after using the Jackery I have to choose which gets socket space, it or my iPhone. Will recommend to friends & family.
4495755
I've used it, right out of the box (it was charged to the 75% level, based on the LEDs), to recharge my iPhone 4 times.  Now that it is down to 1 LED (under 25%), I've charged up the Power Bank.  It seemed to charge my iPhone faster than plugging it into the wall outlet.  Only reason (well 2) I didn't give it 5 stars is that it is fairly heavy and it didn't come with it's own Apple Lightening connector.  Other than that, it works very well, very simple to use and seems to be very well made.
4801001
I bought this for a recent business trip and could not be happier. I think I recharged my 3G iPhone almost 6 or seven times, and still had power left over! It charged my iPad to about 78%. I'm thinking about getting another one to have as a backup to my backup for extra long trips! Once it's juiced all the way down, it does take a little while to recharge if charging through USB port. Seems to charge a little bit faster if I plug the cord into my Apple charging cord (wall plug) with USB port.
UPDATE 9/28/12: I am buying  second Juice pak. I've had a chance to use this in a variety of situations. It really charges an iPhone fast.  It is performed very well . I wish they would come out with a 10,000 version that would fully charge an IPad, but the current one does a nice backup  for the iPad. Wish it had its own chargingn Abel, but I use my iPad connector.
4362060
Works great, my phone says the full 3 amps charge rate.  So basically goes to around 80% charge at this rate in 45 minutes or so.  The other 2 ports work well too, my phone can get 2.5 amps from them...