I found ant lights are really bad and say if I left my headlight on one bike when I rode another one then it may not connect to it again. I ride a lot in Sumer maybe 250 miles a week but the radar is what runs out first then I just charge them both, I have seen so many glitches in garmin but they usually jsut keep going, on our tandem my wife has the explore. I have it in battery save mode as she is blind and cant see it. but a screen will pop up after a couple of minutes with a tip about saving battery with a screen that turns off but the thing will stay up the whole ride.