Hi.. I use an iMac 21.5 with bluetooh keyboard and Apple Mouse. Whenever I change the batteries, the iMac takes like 10-15 minutes to show, CONNECTED. I dont know, why it takes that long. Sometimes, it doesnt get connected for 30 mins also. Then I switch on switch off the mouse 2-3 times to get it connected. ****. There should be a way to tell the iMac that new batteries has been replaced and please connect to my bluetooth. Is there any specific spot on the imac, where I need to move the Apple Mouse after changing the batteries ? Let me know..