I did some research and the only light weight option I can find is Photon Rex with USB charging accessory. Is there anything else?
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USB rechargeable flashlight / headlamp?
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Petzl Tikka with the Core battery accessory. Black Diamond Sprinter headlamp.
Watch out for that Photon Rex. Some of the worst reviews I've ever seen on a piece of equipment.
Tikka XP with core looks interesting.
Thanks for the warning on Rex.
I currently have an Eos but I want something that I can charge directly from a 5v solar panel. I don't want to carry spare batteries.
Isn't it time for tikka 3?
I have the Tikka w/Core.
It's a USB-battery pack, basically. If you need to, you can remove the Core and use standard batteries.
I love mine.
-mox
You'll get a much wider range of options if you think outside the box a bit:
http://www.amazon.com/USBCELL-AA-Rechargable-Battery-MXAA02/dp/B000LV8YKQ
Amazon claims a weight of 1.6 ounces for a 2-pack, which probably includes packaging. The capacity is a bit lower than standard NiMh AA cells, but that doesn't matter because you'll just plug it into your solar panel or whatever every few days.
You could use one of those with a Zebralight H51 for 3 ounces total. 3.8 if you carry a second spare battery.
If you don't need a headlamp, there are lots of USB rechargeable lights designed for bicyclists that might fit your needs.
For example, I sometimes use a Cygo‑Lite ExpiliOn as a handheld flashlight for trail runs at night.
I'm not sure what your total power needs are, but they do make small flashlights with integrated solar panels (the ones I've seen tend to be task lights, not bright beasts like your EOS). Still, they might serve to help simplify your system.
(Apologies for the lazy links.)
Tikka w/Core is 3.1oz on my scale (headband w/whistle included :P ) You can remove the headlamp/battery from the headband receiver if you want.
Tikka charges a single battery in 3 hours; those AAs are 5 hours EACH.
-mox
i have a tikka xp core, and its really nice with the USB cable and the Core OS software from petzl to regulate the output.
if your interested in buying one, im probably going to put mine up for sale, so PM me. i find that i use my mammut headlamp more with rechargeable AAA's.
Hi,
The Led Lenser H7R can be charged via USB or use AAA batteries.
Its my head lamp of choice.
Chris brings up a good suggestion above. But I think I have found a much better solution which I wanted to share with all of you,
USBCELL is very inefficient. Li-ion is much better but the question is how to charge it via USB. Presenting the world's smallest and lightest li ion charger:

This opens up a lot of options. There are many awesome lights that work with li-ions, such as zebralight H31. I like this better then tikka Core.
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