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: how to replace battery
Document: The wireless mouse works great. This is the second wireless mouse from Microsoft I have purchased and I am very satisfied with it. It is easy to plug in and out. The battery is easy to replace. It is available in various colors.
Otherwise, not much to say about it. Buy it if you just want it for a short term thing, otherwise there are better options.PS: Battery life was great-I never had to replace the battery once during the 4 months.
Excellent produce, very comfortable. Only issues would be having to remove the USB drive and putting it on the mouse to turn it off- no auto turnoff. Also, sometimes the battery isn't recognized so you have to replace the battery. Otherwise it works great- best for the price!
The battery is a snap to remove-replace when necessary, though the battery (AA) which came with the mouse is still working fine.The mouse was packed with a small, handy, fold-out-card of graphic instructions, which were as simple as any electronic idiot (like me) could hope for!!
This is a great product, my other mouse had a small cord so I got this mouse to replace it and I think this mouse works way better than my old one did. This wireless mouse works perfect, no more cords being pulled on! To my surprise it came with a battery, that was easy to put in.
I picked this mouse up this morning for my laptop to replace my Belkin.I am completely satisifed with this mouse and I'm pretty picky about my mice.Responsive, fast, only 1 battery required (they even give you one).Good job Microsoft. Great great product!
I got this mouse about 2 weeks ago. I have yet to unplug the USB stick to replace on the mouse to turn off the battery. It is still going strong and very comfortable to use. I have small hands so it's hard to find a mouse that I can use comfortably.
worked great for a couple of years-had to replace the battery a lot because we almost never turned off the laser because of the awkward on/off switch-USB antenna gets in the waysomething got loose inside and it was hard to get the battery to sit right so the laser would stay on, then with no warning it just wouldn't work any more
This wireless mouse beats any corded mouse hands down. But, I had to add an extension to the USB port in order to get the dongle closer to the mouse. The signal range is 3-4 feet. You have to replace the battery about once per month with a lot of use. The mouse itself has a nice feel to it.
I use this product every day. I use it with a graphics software program and it works great. I replace the battery every 3-4 months. This is my second mouse of this model, the first one lasted about a 1 1/2 years of continuous use.
Answer: Press the button on rear of mouse where the palm of your hand rests.  This releases the cover on top of the mouse which lifts up.  There is one AA battery inside.