Currently for 49R, 70R and 79R - you can increase or decrease the time of your bluetooth connection availability. In the archives there are some pre-made patches, but the authors made it simple, so you can make changes yourself later.
Download HERE

Installation:
You will need to extract the codegroups of your firmware with SHXCodec and patch CG1 with FlashBackup

Later if you wish you can change the amount of minutes using simple seem edit. Seem 004a_0001 on offset 0х91 holds the value. Every digit increase adds additional minute. For example if you set the value to 01 it will be one minute, 0A = 10 minutes, etc.