MacBook – Bluetooth lagging when Magic Mouse and a bluetooth speaker connected

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I'm having problems with my Bluetooth on my MacBook Pro Retina early 2013 OS X 10.9.3

It is constantly losing connection for a few seconds with my Magic Mouse and my Bluetooth speaker (Bose Soundlink Mini) occasionally even resetting the connection so I have to reconnect both.

I started having this problem just recently but it's not the speaker's fault (I've tried others) or the mouse's fault—I've tried disconnecting it.

I have also tried restarting the computer, freeing some memory and so on…

Any ideas?

Best Answer

Check the battery level in your keyboard or mouse. I've found this happens consistently when the peripheral battery is running low and the device seems to start spamming the Bluetooth connection with "help I'm running out of juice" requests. Swapping out your batteries for full ones will reliably fix the issue.