On the 2010 Wrangler the Owners Manual states that the battery must be disconnected when towing. I have a 2007 Jeep Commander that DOES NOT require the battery disconnect. In the past, all my older jeeps DID NOT require the battery disconnect. So my guess is that something has changed and Jeep now thinks this is needed. There is no good explanation in the Owners Manual on why. I did find a note that if you are going to store the Jeep for more then 2 1/2 weeks to pull a 60 AMP fuse in the power distribution center" (fuse box under the hood). For now, I will install a battery disconnect and run a dedicated circuit for the brake buddy.