Originally Posted by
Leisesturm
I use Gemini battery packs with my Magicshine lights on the recommendation of the guy who runs 'Action LED'. I don't really pay attention to advertised runtimes. Most likely the runtime is not being calculated on the highest intensity of the light, which is likely the one used most often.
I bought one of my Magicshines from him. I never trusted the advertised runtimes, and the aftermarket battery packs weren't even close to delivering the advertised times.