Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Battery dies in less than 2 hours after a full charge.  Is this normal or is mine defective?
Document: First purchase on 3/25/2014. Had to get a replacement on 4/17/2014 since the battery kept on dying in less than 1 hour. Two months later, now it dies in a matter of minutes after a full charge.Now I need another product (not a replacement of this product) that actually works...
Great device for helping with rsi. I'm a programmer and I can be quite productive with this device. The battery on mine lasts only 2-3 hours though. I called the company and they say it should last 5-8 hours. So I'm going to return mine to see if I can get a better one.
This little mouse packs quiet a punch. This mouse does take some getting used to but I love to use it now.Only cons I could think of:-Short battery life, maybe a couple of hours.
Very uncomfortable. Terrible resolution. Impossible to change sensitivity/mouse speed. Impossible to reassign buttons with the software. Battery died in 2 month. Now it is a 40$ useless brick.
So far it works exactly like it's supposed to. I had to keep the manual handy until I memorized what all of the buttons do. Once I remembered how to use it I could do everything I do with a normal mouse. Even things like Google Maps are no problem. It does require deliberate control. Some things take 2 different buttons so you have to make sure you do each one properly.
Distance: I was able to use it from over 35 ft. away from my computer. I can't attest the battery life just yet.Conclusion: buy it!
Two problems that bothered me1. The distance is too short, not even 3 meters.2. The back page button is not functioning on Mac OS X, even I downloaded the driver
I really like this mouse! I was having trouble with my mousing shoulder from having it in an extended position a lot. With this on my left hand I can use it for most everything and mouse with my right hand only occasionally. It takes a bit of getting used to but is easy to use and the button features are excellent.It does get 'stuck' occasionally, which is why I gave it 4 stars. Simply plugging it in to charge for a second gets it started again.
When I'm traveling in the car or on a plane, I have such a hard time with the touch pad and, of course, you have no surface for a regular mouse. I've even tried track balls and still get a lot of stutter. This was just the solution I was trying to find. The flexible rubber ring is soft enough to be adequately comfortable. It is about a size 9, and my index finger is about a 13. So I would like it to be just a little less snug.
I have an Alienware computer running Windows 7. The driver installed easily however I had placed the dongle too close to another USB running at 2.4 MHz and had tracking problems. When I moved it farther away, to a different USB port, the tracking problems stopped. Use of the device is fairly intuitive, but it takes a little while to get used to switching on and off the scroll function. It actually works a lot better than I thought it was going to.
Answer: Definitely issue.  Mine lasts a whole day, easy.  I'd look up if there is a way to reset the mouse and start charging again.  May not have been fully charged initially.  if no other options, would ask for replacement.