Powerhouse for SLR

I use the Duracell DL 223 into an analog SLR camera as a supply for the electronics. The Powerhouse of Duracell keeps doing through countless movies. This is the first battery in the camera and for over a year so you go on extensive photo tours. I bought when ordering through Amazon two pieces, but would not have thought that the batteries should last as well.

Greeting
Thorsten H.