This battery is a perfect replacement for the 12CE5 style. It replaced a battery in a livestock trailer that is used to auto activate the breaks should the trailer accidentally detach from the truck. You wouldn't want a junky battery for that emergency purpose and this battery is the perfect solution!Fit perfectly into my APC Back-UPS 550 and no problems for the last year. Invisible and that's a good thing.Exact replacement and works finemuch less expensive battery back up for my invisible fence!Solved the problem. Fit perfectly and easy to install.Works great in my fire alarm panel