Rangefinders- built in battery vs. CR2

I get about 60 rounds on my Blue Tees with built in battery. Have to recharge it every few months.
 
I'm in the CR2 camp myself as I already have way too many things to charge.
 
I prefer the batter I have enough things to make sure they are charged I don’t need another in a rangefinder
 
I've used my rangefinder for 3 years, and the battery's only died on me once. I keep an extra CR2 in the rangefinder case now just to be safe.
 
I already have to remember to charge my Bushnell wingman and I constantly forget to charge it or even worse is I forget to grab it from where I charge it. I can only imagine having the same issue with a rangefinder that requires charging.
 
CR2, and carry a couple just in case.
 
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