[Mashiro]

If you go wireless don't cheap out! If I hear "I bought a cordless mouse for $6 and it was bad"... you get what you pay for.

I used a lot of cheap wireless mouses in the past, too. Had about the similar experience in terms of quality and battery. Especially battery usage seems to be a big issue on cheaper wireless mouses. The last 4 years I have been using a Cherry B.UNLIMITED 3.0 set and really liked it. Both the keyboard and mouse lasted for a very long time (more than several months). They had rechargeable batteries, a charge port and a charge cable. So easy recharge and no battery swap needed. The quality was also alright. I used a used set at work though. It was a bit used and worn and sadly not that well. So for about a year now I'm using a Logitech MK850 set. Also works absolutely perfect and lasts long. I replaced the non-rechargeable with good Vatra rechargeable ones though. So I can take them out while I'm not using the keyboard/mouse and recharge them if needed.

About experiencing weird issues with the wireless mouse:
a) don't plug the USB receiver directly into the computer
b) use a USB extension cable and plug it into that cable
c) if you have to plug it into your computer try to avoid USB 3.0 ports
d) avoid pluging it near bluetooth and WiFi devices in your computer

Why all of this? Quite simple: electro magnetic interference caused by USB ports (especially 3.0) and other wireless signals are the root cause of the mouse or keyboard connection acting up.

I have my receiver connected over a USB extension and have absolutely zero issues. The MK850 included a USB extension cable just for the receiver (probably already to combat those issues and for better reception of the signal).

REMEMBER: wireless mouses/keyboards operate on the same signal range and frequencies as WiFi and bluetooth. USB 3.0 ports also cause almost similar but way worse interference (mostly due to bad shielding).