Got a new iMac that came with a fancy new mouse, wireless. However, the battery gets low about every 2 weeks. That's no problem. But the new mouse has a connection underneath for the cable. And once plugged in it's useless and doesn't work, and can't work due to it's design as it's plugged in underneath. That's ok - although a stupid design. My main gripe is - and perhaps someone knows how - I only get a warning when it's at 2%. Can I change this to warn me when it's at 10% or 20% or anything else other than it's nearly dead?