how to escape pipe symbol | in bat scripts?

pipe batch-file echo

Use a caret.

eg. 

echo %0 on^|off

Related

Why do lots of games have Direct X 9 and 11 options, but NOT DX10?
Difference between NetBIOS and SMB
Can I "transfer" my Windows 7 license to a virtual machine running on the same computer?
setting ulimit on a running process
More crisp font for iTerm on OSX
Resuming Windows 7 from Hibernate after a RAM change?
How to add Google Drive to the Windows Explorer Sidebar
'http" not supported or disabled in libcurl
Disable Absolute Volume in Windows 10 bluetooth stack
Linux PDF version converter
How can I explain what a computer virus is to people who are not familiar with computers and programming?
Continuously monitor files opened/accessed by a process