DEFECTIVE battery, scratched and poor quality
935878
Previously had a cheap brand and OEM replacement battery, which both were at the end of their design life.  After extensive research purchased the Anker replacement battery at a premium over similar replacement batteries due to positive reviews.

Extremely disappointed with the Anker battery.  Defective upon arrival including a scratch on the battery and poor build quality on the case.  Case appears to be peeling off and is separated at the seams.  Appears cheaply made and potentially hazardous.

Switched batteries back to the original replacements and contacted customer service.  Will provide future update.
1086338
Already scratched when received, couldn't even use it.
3665853
Device came with a bunch of scratches on the face, 3.5mm jack, and charging port indicating that it was used prior. Unstatisfied with this product. Aukey, do better!
4581526
My review is not about the battery but the manner in which they are shipped. I ordered two of these batteries for my 22' sportfisherman. I had a set of Optima yellow tops and ordered two of these for replacements.  When the batteries arrived I found they had been packaged very poorly. The cardboard boxes was twice the size of the batteries and had two pieces of brown wrapping paper each as packing. The negative terminals on one battery were broken and bent over and the other has a crack on the top of the housing between the "P" and "T" in Optima. So much for a sealed battery! The blue tops on both batteries showed stress marks from bouncing around.

I contacted three different representatives of Amazon Customer Service about the damaged batteries. I was advised that the batteries would be replaced free of charge. I emphasized to the reps that the batteries should be more securely packaged.  One of the replacement batteries arrived today.  It came in a cardboard box not twice but four times the size of the battery with, you guessed it, two pieces of brown wrapping paper and was also dinged up.

I spoke with a supervisor who told me that they would do an investigation and pull the batteries off the web until they could determine the problem. I advised him that they would have to stop selling all of their batteries if they keep the imbecile in shipping that is sending them out in the above manner.
4829180
Backpack was scratched, batteries and lanyard were missing, and micro sd card was defective. Worst amazon experience ever... buyer beware
2687336
Blister pack is damaged and locking tab on battery is Broken. Let's see how long it's going to take to get the replacement....Will review Replacement when I receive it.
498622
I bought a pair from e  rainbow. Including the 3800mah  batteries. Very sad as one of the screens isn't working at all... very sad because they obviously open the boxes and insert the higher battery capacity on these rigs before they ship them and I know they turn them on and could easily realize the screen is not working...  only the left side is viewable. Very upset and won't be buying from them again.
3789551
This battery is worse than the one I already had; and the reason I ordered a new battery was because THAT one was bad.
3236446
Came in a opened smashed box. Finger smudges on the unit. The directions say to install the battery in my case it was already installed. The speaker sounder really good but the battery will not stay charged for more than one song. Draw your own conclusions but I wanted a new one and new is what I paid for. I have sent off for a new battery that I won't get for another mth. So 2 mths after my purchase of this Item I should receive the battery. If I new I was going to get a second hand me down I would have never bought this in the first place. I wrote Amazon and no reply. Also I took pictures of  how it was received. I will let you know how it sounds when I get the new battery I had to buy in addition.
83807
They shipped me the battery which was not fresh at all and already "Died / used". I have been trying since the day first but as soon as I remove the charger my computer turned off. I'm very much dissatisfied.
4946632
I received this battery to replace the battery of my Toshiba Satellite S850 and my computer immediately told me that the battery I was using was poor. I thought this might be a mistake so I powered off my computer and turn it back on with the battery attach and again I was told the battery was poor. I decided to test the battery myself and even with  power savings on this battery barely last more than an hour and I JUST GOT IT.

This battery came to me in poor quality and I am upset
1064398
Originally bought this for my Nikon AW100 camera, but I didn't bother putting it in after seeing it.

PROS:
None - my review is similar to the other low-rated ones here.

CONS:
-Bought new, but came used with some scuffs and marks
-NOT retail packaging; battery looked like it was in a 3rd-party packaging and sealing
-Made in China; authentic Nikon OEM batteries are made in Japan
-Looks similar to OEM but with subtle differences (such as the text in the back, etc.)
-Did not get my full refund as requested (excluded shipping and tax).  I don't see how Amazon let's other parties sell products NOT AS DESCRIBED here.

Don't buy from here!  I HIGHLY recommend skipping the trouble and pay a few extra bucks for a real authentic OEM battery from adorama.com.
4144237
I don't think I received a new battery. It was all scratched and it looks like used one. But, it's working for now. Not sure how long it will last. I just didn't want to deal with the return process as I needed the battery right away. For that reason, I'm giving 3 stars.
1384746
Item came as separate pieces wrapped in plastic. The original box for the product was missing. One page photocopy of instructions. When I opened the screen there were finger prints and scratches on the display. I charged up the battery as required for 24 hours and then tried the camera. The display worked but the camera did not. It was very obvious that this product was a return that didn't work. Extremely disappointed that a supplier like this can still rip you off even through Amazon. I haven't checked lately but I still have not received a refund or a notice of refund from Amazon.
4810220
PREFACE:  I purchased this on Sep. 2, 2015 on Amazon for $35.

PROS:
- Large power capacity
- Two USB charging ports (1A and 2.4A)
- Decent customer support (this may change depending on if they honor their warranty or not)

CONS:
- Heavy
- Included flashlight is too dim to justify
- Much slower to recharge than advertised
- Unit arrived scratched and without a charge

Although this battery was somewhat useful while it lasted, my unit has found a premature end. Its been roughly a year since I purchased it and now the unit will no longer charge. Ive taken proper care of the unit, never dropping it or subjecting it to adverse conditions, and have been regularly and successfully recharging it at least bimonthly as recommended by Aukey, regardless of whether I planned on using it or not. Its been a little less than a month since my last charge, the units been plugged in to my computer for the past 10 or so hours, and I am still not getting any charge.

The problems with this battery started the moment I received the unit. Despite following the charging instructions, and using the supplied USB cable, every time I plugged the unit into my Macs USB port, a popup would show that the unit was drawing too much power and the unit and cable would become surprisingly warm. Im not sure if this was user error or a production flaw. But there was no supplied power plug, so one has to assume that this should be USB agnostic and I went ahead like this was normal. The manual doesnt give any specifics beyond using their cable and plugging it into a computer or third party power plug, and until recently, I was able to successfully charge and discharge the unit several times over.

They claim the unit should fully charge in 10-12 hours. However I never once got near that time, finding the best I could do was roughly 20 hours to fully charge from zero. On a positive note, I was able to charge my iPad and smartphone several times over and this process was relatively quick. But all good things must come to an end.

Maybe the fact that my new unit came scratched shouldve acted as a clue as to the condition of my unit. And the fact that the battery had no charge when it arrived and I had to charge it from zero. Whatever the case may be, their customer service was satisfactory for an international company, however I wouldve preferred a new unit under the warranty terms given the condition, but was told that my unit was behaving normally and to contact them if I had any other issues.

I have updated Aukey support on the current condition of the battery, and hopefully they will honor their 18-month warranty (now they're selling the unit with a 24-month warranty). I will update this review once they reply.

CONCLUSION:  I love Aukey but the unit they sent me was a lemon. I expected this to last more than a year. Buyer beware.
3986924
Well, I received the battery quickly, but it has completely failed. The unit reports an unknown error, cannot run a self test, and cannot be charged. Amazon's shipping policies do not allow for this battery to be returned. It seems like the majority of batteries shipped are good, but I guess I lost an $80 bet. Maybe you will get a good one, or maybe you'll just get screwed, too.
531727
I received the item in a horribly damaged box and the outside box looked like a child taped it. When we opened the box, the box to the blower was damaged. Then when opened the contents of the Echo box and plugged in the battery to charge, the charger said the battery was defective. We immediately returned it.