CCRphoto

I normally dive on a rebreather, and now that I am getting back into underwater photography I'm looking for a monitor that has a really long battery life to add to the Nauticam housing that I recently picked up secondhand so as the monitor will last as long as the rebreather. What are the options for monitors that last longer than 2 hours? And what else do I need to know about monitors when selecting one? Are there any articles or dummies guides to selecting a monitor?

Just starting to get back into U/W photo after a 30 year break - seems like everyone needs a lot more cables and doodads and doohickeys now!