I am so ticked at myself.
A couple years ago my brother gave me a really nice emergency light made by Stanley. I allocated it to the RV and stored it away. We are preparing to take the RV on the road so I have been dragging things out to verify what we might need.
The light does not work. Guess why! It has batteries, duh. You don't store battery powered items away for months and years with the batteries installed. Just don't do it.
I need to say nothing more for you to know what I have done.
Don't be stupid like I have just discovered that I am.