I concur. Over weekend in living room (during all this NC rain) I set up my gear w/transmitters pointing down, deleted the spgs. Batteries - also concur. Last fall when I started SM I got a second transmitter. But prior to that I set up an interval for the battery life in my DiveLog to remind me well before the estimate. The minor expense of the more frequent batter replacement for transmitters is worth it. My perdix gives me battery life. Would be cool if the perdix would display transmitter battery remaining, too.