I keep one of these in my work motor as an ‘always ready’ backup, plus another in my own motor for same reasons. :bigsmile:
My ones, and all others i see advertised are 0.5 w and about 20 - 30 lumen.
Why its ok, its not very bright ……… Does anyone know of a brighter version … say 1W ??
No-one ?
Someone must make a ‘punchier’ version …… what about the modders, anything you can do???
Usually get more attention by including a link &/or picture. 
Its battery & driver may not be able to support a brighter led. Ones I see claim to use ni-mh, which would have less capacity then li-ion. Ni-mh also needs a boost driver to reach led voltage.
Though the 1st question has to be if it just uses a resistor to endlessly trickle charge. Not good for its life span.
Does the charging indicator go out when fully charged?
Have you tried to open it?
Anything can be upgraded but to get a decent improvement, you might wind up needing to replace everything except for the shell…
I should be receiving a kind of similar light (in a month or so from china :weary:). Its USB recharging though. Mini Android Figure USB Rechargeable 2-Mode Flashlight $4.33 Might be brighter & ebay has cheap mini cigarette lighter USB chargers I know the combination won’t be as compact tho…
Someone did a teardown of a USB one (but the thread has been deleted). Li-poly battery & “red charging indicator, changes into green after fully charged” shows it uses a actual intelligent charging chip. Might be able to just upgrade the led since Li-poly voltage is enough to direct drive. Or if desired upgrade the battery & add a driver. IMO its a good charging chip that gives a base & options to upgrade.
Check out the Klarus RS1A and RS16. They are a USB rechargeable (which means you can charge it in your car with a tiny cigar lighter adapter), self contained light. The 1A uses and charges one AA NiMH cell. The 16 uses and charges one 16430 cell. They also feature an XP-G2 LED. I have been thinking about picking one up because it looks like a great little light. Not to mention, judging by the runtimes, the driver looks to be really efficient.
A bit different suggestions but why not try a BLF Mini with a single CR123?
It will run ages in general use on low with CR123 yet is able to put out serious light for shorter period.
“Someone did a teardown of a USB one (but the thread has been deleted).”
Why? I remember that thread yeah.
Why?
On cpf, why NOT? 
The battery is supposed to be 3 nimh cells so it should support an x-lamp. It’s all plastic inside but does have a nice optic and charges in the lighter socket. If it can be modded it would make a nice car option. We need some good close ups of the boards to sort it out. Apparently there isn’t any circuitry other than the contacts at the other end so no need to open it further.
Those are button cell NiMH cells stacked in series. At least that’s how it is with the one I had.
Wow, I forgot about stacked nimh in series! :X
No idea why the thread disappeared. Took some work to find it was gone, thought I was going a bit mad. S) Glad someone else recalls it! Found a link to the thread finally in google cache here. The actual page isn’t cached tho.
There were pictures of the battery & charging chip. Chip was a tiny sot23-5, perhaps mcp73831 or max1555 (or chinese clone?).
Led Lenser make one
http://www.ledlenser.com.au/products/classic-line/automotive/automotive-12v/
The new Cree chip xqe(?) might make a decent upgrade option improving output and color rendering. I think mine is a Utilitech version of the cigarette socket light and has a very bluish color(aside from the bright blue charge indicator).
Don’t let yourself be fooled by wattage numbers. They’ll tell you a lot about current demand, but nothing about actual brightness.
An XP-G and an XM-L can both be powered by the very same 4.2V LiIon 18650, regulated by a NANJG 105c - which will (in theory) deliver 11.86W in both cases, and yet the actual output will be much different.
An analogy from the world of cars: Just because one motor would produce 50 break horse power whilst consuming five litres a mile doesn’t mean that petrol consumtion alone would be a sole indicator for top speed.