Forerunner 165 + Other Options

Hi,

I'm new to Garmin and am looking for some advice. I would like a watch with the best battery life that can track distance running, biking, and swimming both laps in the pool and in open water. I do not need any extra functions, I just want to track my distance and time in the triathlon activities. I think the Garmin Forerunner 165 is potentially my cheapest option to get these basic functions, as other cheaper watches do not have the OW option.

If anyone can confirm this choice or has any other advice or suggestions, I would really appreciate it. Thanks so much!