2009 Motobecane Fantom CX
2008 Jamis Coda
1999 Trek 930
ISO: Carradice SQR Rucksack Harness.
It's a very valid point that you have made and one that I hadn't fully considered before.
Obviously being able to stop somewhere and buy some extra AAs is a feature worth considering.
And strangely enough I just invested $10 in a couple of extra 18650s to carry around, because of their very low self discharge rate they can just be stowed with tools or kept in a pocket.
Now that you've pointed out the drawback of having a battery pack unique to a headlight and only made by the manufacturer, suddenly using a torch seems like a much brighter idea than before.
You've convinced me, torches are best - long live the P7 !!
I haven't had much trouble remembering to recharge my batteries.