Thank you all for posting about the battery!
I have the classic Davis leaking capacitor going on, and didn’t realize it until I chewed up 2 batteries in the past month.
For the last battery I got before finding out about the capacitor issue, I just grabbed one quickly at a hardware store, and paid $11.50!!!
I just placed my order for 2 of the 123’s we need, and also stocked up on AA’s and 9V’s while I was there.
So, to replace my ISS SIM, plus 1 expensive battery, I am up to $83.50…
Anyway, thanks for sharing the battery site!