No suggestions.
Just cool as hell.
(bows)
Whenever I need battery replacements, I have a small box of these, a lot of sellers sell the same thing:
https://www.amazon.com/Voltage-Regulator-MELIFE-3-0-40V-Converter/dp/B08BLBYWN1/ref=sr_1_4
You feed them anything (I usually have 12v) and turn the knob until you get 3v or whatever voltage the battery used to supply.