The batteries were bad and I sent the owner a e-mail about the ...
579771
The batteries were bad and I sent the owner a e-mail about the problem and for some reason did not get a response
3927413
The battery was not able to hold a charge. Bought another one after returning the defective one and it was the same. Bad battery. I called the manufacturer and they said they don't make this one any longer. These are old units and likely all with bad batteries. Would not recommend. I even sent a message to the seller asking for some resolution and never heard back from them. Only got a refund. Quick refund at least!
3938048
Pretty sad. I see quite a few reviews about the batteries being dead or not lasting and kinda wish I'd read more reviews before purchasing. These things were basically DEAD. It was a good thing I kept the old battery because I put it back in after two weeks. I had the old battery in for almost 6 MONTHS and it had more juice left than these "new" ones. My suggestion: Pay the extra money and buy them direct from the company or at the big name pet stores where the stock should be fresh. Also odd: I contacted the company and they said they don't put dates on their batteries.
2247100
The first battery I got was "bloated" and would not fit in my camera.  The company quickly sent out another, but that failed to take charge.  I have no problem with the customer service they took both returns without argument, but I wish one of the batteries would have worked properly instead.
558844
BOUGHT THIS BUT DIDNT USE IT FOR THE FIRST TIME FOR ABOUT 6 MONTHS AFTER I GOT IT.  FROM THE TIME I OPENED THE PACKAGE AND TRIED TO CHARGE IT THE FIRST TIME, IT WOULD NOT CHARGE FOR MORE THAN 10 MIN.  THE SCREEN SHOWED A FULL CHARGE BUT IT WOULD DIE AFTER 2 MINUTES.  I EMAILED THE COMPANY AND HE SAID BECAUSE IT WAS AFTER THEIR 30 DAY WARRANTY THAT I WOULD HAVE TO BUY A NEW BATTERY.  NOW THE BATTERIES ARE CHEAP BUT I DONT FEEL A BRAND NEW BATTERY SHOULD BE DEFECTIVE AND THAT I SHOULD HAVE TO PAY FOR IT.  PISS POOR PRODUCT AND HORRIBLE CUSTOMER SERVICE.
3366146
I purchased this battery two years ago. I mostly keep the computer plugged in, and I was getting about 1-1.5 hours use when I unplugged it. But recently, the battery has gone bad and now I'm only able to be without electricity for 10 minutes. I did get two years out of it, so it isn't a total lemon. The warranty was 18 months, so I guess that's probably all you should expect to get.

But after writing this review as three stars, Anker contacted me and offered a replacement, even though it was out of warranty. That's great customer service. I'll buy my next battery from Anker.
805826
Top and bottom plastic parts began to fall off within days. once lost the batteries wouldn't sit properly so any bump to the phone would cause the phone to shut down. after about a month, the capacity of the battery was so bad, it would behave like a battery that was two years old.

I did contact zero lemon after about two months and told them the problems I was having and they refunded my purchase within a couple of days after sending them screen shots of my orders.
4621282
Had problems with batteries.  Contacted holy stone and they replaced batteries on their dime thanks a lot holy stone.
4331504
I wrote a review this morning stating how the batteries did not stay charged and the seller emailed me and tried to reach me by phone ... he sent 2 more new batteries after testing them to make sure they worked properly ...

This seller is to be highly commended for standing behind his product  ... I will definitely do business with this seller in the future
4587593
The batteries are clearly not new, as they are all scratched and a couple are dented a bit. The battery doesn't stay very well on one side, and I haven't the slightest idea how to tell if one or both batteries are charged. After letting it sit there for a few minutes, one light turned green. Both batteries were slightly charged, but not fully. Very disappointed in this product! Pay a bit more, and get one that's from a reputable company, you will not regret it.

EDIT: This company contacted me, and sent me a brand new set of these. Very, very cool, and they work! Upgrading my previous to 5 stars for customer service alone! Also, the new products work as advertised. Thanks, IAGtek!
2683007
Well, after using this it turns out one pair of  these batteries really suck. They do not hold a charge at all and when you do charge them for the correct amount of time they go dead without even using them for a day! I contacted the company and they quickly responded and gave me a full refund. The other set of batteries works great. I must have been sent a defective pair of batteries. Company seems to be very good about making things right for their customers.
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.
4019406
Batteries were not working, or charger, so they sent me new ones and still do no work. I wouldn't get it again.
3132163
1 of the batteries had a bad cell, worked twice and then never took a charge or turned on the phone.
664782
The battery will not hold a charge,some one said they were going to replace,that would be nice
2081954
When i got it in the mail it came with missing parts that rendered the unit unusable. The back battery part to be precise, it didn't have the receiving prongs for battery usage
649026
I'm doing this note, to rectify a bad score that places the product "AUTOMATIC BATTERY MAINTENER 6 VOLT / 12 VOLT" since ignorance of the use of this equipment, because it is not clear in the manual, I thought the team was damaged, and placing it in a battery that had no charge extra equipment gave no indication it was working (not lit LED), place my complaint to Customer Service and they called me to explain the problem was happening with the team is that this team DOES NOT HAVE LESS IN BATTERY VOLT or A 2 COMPLETELY DEAD LOAD, ie; this team is a maintainer and not a charger, which is why I did not work at first when trying to load a battery of emergency lamp that was completely unloaded, but not connect to the battery in my car if began to operate automatically .
I also thank publicly the company Baccus Global LLC, representative of the firm "Black & Decker" I called to my house (Venezuela) to give explanations on the operation of equipment, consider excellent the customer service (Baccus Global LLC) as I was worried to call me and solve my problem.
Therefore change 1 star 3 stars due to lack putting on these data clearly the instruction manual, plus advertising must specify no charge battery completely dead, so prospective buyers can decide whether the product meets your requirements or not.