Acer N745 stuck

The top should have a button to release the receiver (on the lower half). If pushing this does not release it, you can disassemble the mouse fairly easily (you do not even have to break the warranty seal). Removing the cover to install batteries, you should see two screws. Remove them. on the bottom, underneath the upper-left corner of the "Acer" sticker is the third screw. Once disassembled, if you look at the top, you should see two white "tabs" that when depressed should release the receiver. If this still does not release it, you can then remove the bottom half of the mouse and then lift (since it's inverted now) the tabs. Hope this helps!