https://www.amazon.com/gp/prod…TF8&psc=1#customerReviews
I bought this in 2017. Today I just remembered I left it in my slingshot outside. We’re in the subzero cold snap. It’s -3 with -19 windchill. I fully expected it to be ruined....i brought it in to warm up. Then I plugged it in to charge it. Not only did it charge it had retained 95% of its charge since early spring. I’m very impressed.
