Configuring the 733 can be a pain. When I convinced two of my co-workers to purchase one, I had them bring the 733s to work, so I could do the basic config on them. A fuel level type indicator for battery condition would be a plus. This way, a user could determine if batteries need replacement before a long smoke.
In spite of all of these statements, the 733 is one of my essential cooking tools.
You should also email Maverick about that suggestion because I wish I had thought of it. The first indication I got that I had a dead battery in the receiving unit was its failure to turn on.