ok perhaps a bit of a long shot here... had some of the good old faithful Magicshine LED lights for a long long time. lights have been awesome. After first battery died was able to find replacement on Amazon. Can't find them cheap anymore (last paid about $15) there... looking for the 7.4V Li-ion, preferably more than 3000mAh, but has to have the Trail-tech female plugin. Looks kinda like this:
https://www.amazon.ca/dp/B08DDB7FGW/...v_ov_lig_dp_it