If you frequent using Linkedin on your BlackBerry you'll wanna make sure you grab the latest version available. Verson 1.2 has been released and this version addresses a lot of concerns users had with the application such as; contact management and battery life. The official words are:
We’ve just released an update focused on performance, battery life and resolving several issues our users were seeing with downloading connections. We made a number of changes to how we handle merging your address book with the BlackBerry Contacts application and other changes that should significantly reduce the battery life issues some users have reported.
Having used the application in the past, I can sure say it did suck back a lot of battery life while in use. Hopefully, this will be the end of those concerns for Linkedin BlackBerry users.