I still fail to see how an electronic lock would perform any better than a key or combination lock, and why I should spend more money for something I have to use my cell phone for, which may or may not be out of juice at the time, or lost, or stolen, or left at home. Most modern, reputable U-locks also lock on both sides.
What happens when your lock's battery dies bc you forgot to charge it....if it has a combination then why even bother with the electronic portion?