Model 99929 how do I open mouse to change battery?

if the mouse is wired to the back of the computer by a usb plug then there will be no battery as the mouse is powered through the usb connection.

Should be a pressing button under the mouse or on the side, but I can find any picture of the side or under, only picture from top so is hard to guess

I haven't found the manual for your model, but it's a good bet it's under the palm cover as shown below:

For changing the batteries of logitech wireless.I guess a video tutorial will help you out rather than written instructions. Watch it to lean how to replace battery of the logitech cordless mouse ( Logitech MX 1000 Model). If you are having a different model please specify the details of your model.

hi marlys, i am happy to assist , Ya its not too easy to replace battery in logitech cordless mouse,in the back of mouse, you have mouse pad just remove it , you can see they provision to remove the mouse, there been Four screws been inside that mouse pad, But before going to open your mouse just check you have new battery with you, if you connt find in any shops just go to eBay , you can get it thee, If you mansion the excate model name of your mouse mean i will send video for that particular model itself , no issue just check out this video

if u look seriously. you can get above side is two part and below side is one part, press above scroll ,'againast side of the cover and pull (there is a plastick lock.)

Normal 0 If the mouse doesn't have a little door to open on the bottom, then try this. Just behind the Left and Right keys where your hand rests, apply firm pressure down on the cover and slide to the rear. Some mouse manufactures have used this type of access to replace the batteries.
Hope this helps. Bud

Normal 0 If the mouse doesn't have a little door to open on the bottom, then try this. Just behind the Left and Right keys where your hand rests, apply firm pressure down on the cover and slide to the rear. Some mouse manufactures have used this type of access to replace the batteries.
Hope this helps. Bud

First ,You will need you model number, then go to the Logitech website and download a manual for your mouse:

http://logitech-en-amr.custhelp.com/cgi-bin/logitech_en_amr.cfg/php/enduser/std_alp.php?p_sid=fycUb4Ph&p_lva=&p_li=&p_page=1&p_cv=&p_pv=2.

Hello,
I had a similar problem with my battery going dead in my Logitech mouse. There was a "aa" battery located under the rear top cover. it's the part that has the Logitech logo on it. You simply press the button underneath the mouse @ the back that has a LOCK symbol on it & lift off the cover. Put in a new battery & you should be good to go.
Fred