resurrecting a zebronics wireless mouse

There was a Zebronics wireless mouse with a USB dongle which was deemed to be "not working" since the LED would go off 2 seconds after inserting a new battery. Poking around to see if it would work, I saw a jumper location at the bottom, which was left open. I thought that maybe that jumper had fallen out and hence it was not working, so googled, and found this - 

FAQ - Companion 2 – Zebronics

So, I tried holding down the scroll wheel and the right-click button for a few seconds - nothing happened - and then inserted the dongle into a USB port. It took a few seconds, but after that, the mouse started working again. So, maybe the scroll wheel and the right-click button did something, or maybe it just needed the dongle to be plugged in before lighting up the LED at the bottom.