Oh believe me, I try to do my bit for the environment and I don't take the immediate environmentally friendly statement of a product or technology as fact. The truth is that some 'green' technologies are just as damaging but its not obvious.
I save my batteries after use, and take them to the recycling ♻ bin after use, my soft plastic goes to the supermarket recycling.
As @Golden Paws has said, rechargeable batteries have an unreliability issue, the charge does not last, so it is use the best battery available. For my alarms, my Duracell batteries are currently on a year, it would be longer, but I bought new alarms in August 2022. My Energizer camera batteries are on 6months, my Petzl headlight batteries are on a year. My rechargeable headlight had to be charged after 4hours.