Review on Rii RM200 Wireless Mouse - Rechargeable 2.4G Optical Mouse with 5 Buttons, USB Nano Receiver, 3 Adjustable DPI Levels, Colorful LED Lights - Ideal for Notebook, PC, Computer (Black) by Alicia Thomas

The only plus points I found about this mouse are: 1. I love that this mouse can be used in the On/ Light Mode2 can change colors. This mouse has an auto power off feature, if and when you leave your desk for a long time it will try to save your life for later. But here is the worst part/cons. This mouse has NO batteries. compartment inside. You charge this mouse with a micro USB cable. Even with a 1-3 hour charge, this mouse will last a maximum of 3-4 days. The charging socket is at the top of the mouse under the click buttons so it's possible to use it while charging with a micro USB plugged in, but it's VERY awkward to move the mouse around. I believe that Logitech battery powered mice can last for weeks compared to this mouse. So my suggestion is to either get 2 of these mice and have one ready as a backup in case one mouse dies or just buy a battery powered mouse.