Works very well and the battery lasts a long time.
597583
Computer instantly recognized the mouse after plugging in the usb wireless adapter. Mouse works very well on a white background counter top with very subtle shades of off white. Very pleased with purchase so much so I ordered another.
2352504
works great! a bit bulky and heavy but that's probably why it works so well, because of the battery.
4142496
This is a very long lasting battery. I can use the battery for a whole day without a recharge. And when I do need a charge it takes less that one hour and a half. Great product .
2279173
I'm happy with the quality and service life of this replacement battery. I've used it a bunch of times with good results
4924250
I have had this battery for almost 2 years and it has finally started to expand (get puffy from old age). For the entire lifetime of having this battery, it performed well and I've only had to worry about battery life once. This is because I've been able to make this battery last about 5 days without having to charge it. Unfortunately, there are no more batteries on Amazon to purchase and will have to revert back to the stock battery to continue using my phone in a safe manner..
4907456
I've been using it for about 6 months now. Solid product and the batteries last a long time and charge extremely fast. Well worth it
1709625
Works very well. And to my surprise battery life really is about 5.5-6 hours. That's what I wanted the most.
3650143
Works great and keeps a charge for a long time. It's very heavy though.
642425
One of my batteries stopped holding a charge, so I got this one in order to have two batteries. Works great and holds a charge for a long time!
2955557
It has good design, great battery duration, it's very easy to use. No problems with it when using it to run
2896503
Battery has been operating very well and runs for a long time.  I only use mine once
a week but it's much stronger than my last battery I purchased.  A very good price for a replacement battery of this quality.
1044985
Very nice device. This thing is very well made and holds a charge for a very long time. It also does a good job of charging all of my devices. I highly recommend this battery pack.
3626587
Works very well and battery life is better than expected. If needed you can keep it plugged in while using it. Well worth the price.
2621706
This battery is a good long life battery. Worth the money it full filled my expectations. I never had to replace it as it charged for a very long time.
998358
The battery seems to be very good. It is larger than the original as 3 cells stick out behind the computer, which was a surprise to me. It fits fine in my bag but might be a problem for some. Otherwise, it's worked very well.
5765
I have had this for several months and it works great. It charges all night and lets me see the time at the same time. The only issue was getting the spare battery to charge. Through troubleshooting, I discovered that the connection wasn't always tight. It didn't bother me enough to send it back. I just stuck a business card in the end and it has been working. Since the battery life can be short, I like having an extra battery in my pocketbook. Overall, a good product.
1337859
Works great and I can even change the battery.