i am not understanding why anyone would prefer a proprietary battery you can't replace in the field over good old AA batteries.
granted the planet bike lights may not be as bright (i use 2) but no matter how long my ride i have unlimited resupply of power available at any convieninece store along the way. but honestly they last so long on 2 AAs i have even stopped carying extra batteries for rides involving only on overnight.
carrying a battery pack (especially when you need more than one) seems like your wasting space and dragging aroung unneccesary weight.
of course when i need lots of light and will only be gone for a few hours (nigh mtb rides) i'll bring my magicshine and use all the ridiculous birghtness it has available but for road rding i fing that level of brightness completely unnecessary.
btw, not trying to crap on your new light but honestly trying to understand the advantage of a light like this over my gold standard the good old pb blaze 2w.