is it am LED bulb or just old fashioned filament?
Are Guild batteries any good for this? I have a 1.3ah 18v Guild battery. I know that some brands among retailers are identical but I could not find anything to say what - Reserved it locally to be sure mind!
Just search for the bulb type and add LED to the search. They probably cost a fraction of what I paid now. https://www.ebay.co.uk/itm/Upgrade-Maglite-5W-LED-Bulb-Flashlight-Cree-Conversion-6-24V-Torches-Cell-P13-5S/202269589809?epid=12017080043&hash=item2f18350131:g:DFgAAOSwQVpatS9J It'll be something like this but make sure you get the right one. Mine is good for 100m long beam. Not got the spread of old filament bulb but for me you want to concentrate the light not spread it.