Pete7874
(Pete7874)
21
Had you mentioned this little detail in the original post, I think we would have saved you a lot of time and aggravation.
For elderly folks, my recommendation is to stick with something that can take regular (non rechargeable) batteries, just to keep things simple - plenty of AA / multi AA lights out there that you can stick lithium cells in, and some of them are capable of producing good amount of light output.