Pros: hight capacity - 20000mAh

Cons: Heavy
bought it three months ago, but have not had a chance to use it until last week and it died (would not charge any more) after the first day of use.

Pros: high capacity and recharges fast great price

Cons: both usb ports only outputting 1 amp tried with multiple devices couldn't get more than 1 amp for the supposedly 2.1 port but the price is good so I suppose I'm content just disappointing that it is so slow to recharge my phone

Pros: Worked well until it broke. Some people have no problem with this model, other people find it stops working after a few months. Aukey is sending me a replacement. Overall, i am happy with my experience. I hope the replacement works as intended for more than a few months.

Cons: After 2 months the batter started to smell like smoke and i no longer felt safe using it. I contacted the manufacturer, and while they are shipping me a replacement, it took a while for them to respond.

Pros: Lots of power. Fast 1X charging. The 2X charging was okay -- I'd say it was more of a 1.5X charging.

Cons: Pretty heavy. Certainly alot heavier than my Anker 14000 mAh charger.
Charging my Galaxy Note 3 on the 2X was slow -- probably about 50% longer than the straight cable.
The USB cable is very short -- probably like 12 in.

Other Thoughts: Its good. It works as it should. Slow for the new quick charge phones.

Pros: Affords more than three full charges on a Samsung Galaxy 3.

Cons: None

Other Thoughts: Impressed, I ultimately bought three for friends: and now waiting to buy more if & when it comes up for a promotional sale.

Pros: huge capacity, good size, good price, and it feels well made

Cons: none

Other Thoughts: Mine didn't come with a charging cable in it so I couldn't recharge the power bank. Not taking an egg off because I contacted Aukey about it and they sent one very quickly without any hassle. Would definitely recommend this power bank to anyone who needs one but doesn't want to spend a lot of money.

Pros: I use this for my Galaxy s5 and it charges it fast. Its comparable to the original charger that comes with the s5 in terms of charging speed 2.1 amps) but portable. Also charged up an iPad mini at the same time as my phone from dead to 90% in ~2 hours.

Cons: The battery pack is heavy so awkward to carry in your pocket. The flash light is pretty useless on it compared to a phone's. The cable provided with the charger didn't fit my phone for some reason, even though the s5 and can take micro usb, and I'm pretty sure the cable provided can only support 1 amp at a time so use your own (took ~8-9 hours to charge up battery pack when it was 1/2 dead, connected to a 10 watts/2.1 amp charger)

Other Thoughts: Gets the job done, overall happy with the purchase. Was one of the best deals around when $21.99

Pros: Huge battery capacity, good mAh to weight ratio, fits in backpacks and sacks easily

Cons: Heavy ~ 1 lb, worked fine with my apple devices for about two weeks, then suddenly would not charge them, displaying a rapidly blinking first blue dot.

Other Thoughts: I bought a second one for my father before this issue occurred, and his white one works perfectly fine. I got a response from Aukey saying they will send me a new one as they had problems with their manufacturer, but I have yet to receive even a reply after sending my invoice no. and address (almost 2 weeks now). In summary, a great portable charger with lots of power, but customer service is lackluster, so if you get one that dies in a few weeks, have fun with a $20 paperweight, buyer beware.

Pros: Very powerful. I have charged my iPhone 5 4 times so far and I have used only 25-50%. I believe I will be able to charge it 10 times before I need to charge the battery. I have owned Anker, I/O Gear, Fremo (x2) and this is the largest capacity batter pack. The best part is this is also inexpensive. Get it!

Cons: Heavy and large. Much larger than any other batter pack I have owned. However, I am traveling to CES and I know with just this battery pack I no longer need to carry a charger.

Other Thoughts: I would recommend this battery pack for frequent traveler for its price and performance. I would buy it again if I have the need.

Pros: Humongous monstrous capacity. charges an iPhone for 5-6 days on a single charge. Fast charging available.

Cons: Charges relatively slowly. Only one pory is 2.1 amps.