Q: sometimes bluetooth magic mouse 2 disconnect

hi,

i am anton, i am using macbook pro 15" early 2011. i am using magic mouse 2. it work well after connect bluetooth. but sometimes (approximately 1 or 2 hours) it will disconnect, i try to logoff bluetooth but it not work, so i restart macbook, than mouse will connect normally. it will happened almost every 1 or 2 hours. anyone have same problem like this? please share the solution? thank you