I forget the number of the battery and brand name but it's in your owners manual (when you recieve the tm). I went ahead and bought a new battery at Walmart. I installed it to make sure it would work since there was a pretty lengthy thread with concerns about the numbers being different than what was initially in the remote. After making sure the spare battery worked I switched 'em back and the one that came in the remote is still holding up great. I have had my trolling motor (same as what you are waiting on to arive) for a year now (using it on average 2-3 days a week...every week) and havent had an issue with a dead battery....yet. My remote has been wet from rain several times and hasnt had any problems.