Astrolux mf04s

Hi guys I’m new to all this flash light stuff, just wondering what mods I could do to my astrolux mfs04s to get it brighter and make it last longer on turbo mode, I’m currently using Panasonic ncr18650b, any links or answers will be great, sorry if I posted in the wrong section

Well, if you want to be slightly brighter and last longer on turbo mode, use higher power, lower resistance cells like the NCR18650GA/Samsung 30Q.

or a stack of SONY VCT6s, but the runtime is probably shorten then

Ok cool how much will the all springs be plus the postage to Melbourne Australia,