I do not ride before dawn or after it gets dark, but sometimes I need a head light that will let car drivers see me, for example, when it is raining. I have a Blackburn Mars blinkie in the back and a Knog strobe in the front, but the batteries of the latter run out incredibly fast (less than 4 hours), especially if I rode in rain. The blinkie works just fine.
Any recommendations for a head light that has good battery life and that won't "drain in the rain"? I was looking at the Portland Design Works "cosmic dreadnought", but it is pricey. If it has TE forum endorsements, I might break the bank for it.
Just in case, I don't understand rechargeable lights that want be connected to the computer via a USB port. In my mind, a muddy / dusty light has no business near my computer!