**** Update Nov 1, 2013 ****
While my Super Flea is still running strong, with sufficient output power and life time for poorly-lit city streets, I have to say that I no longer recommend the Super Flea for one big reason: mounting for this thing is abysmal. The velcro strap is too long for some bike handlebars (I've tried on two hybrids, one road bike), and the strap itself stretched under repeated use. What this means is that when you hit a bumpy part of the road, your light moves and points to the ground. Dangerous. Tightening the strap will result in it snapping over a short period of use, so that's not a solution. Having to remove the velcro band to recharge is already something of an awkward design decision.
The Flea 2.0 don't have this problem because they weigh less and are more balanced. Since Blackburn doesn't offer any other way to mount the Super Flea light other than a velcro strap, I really have to change my review from 5 stars (based on relative performance, size, and ease-of-use) to two, because I find this light becomes unusable after a relatively short period of time.
I've gone through a couple Flea elastic straps, so it wasn't just a bad strap.
Also, I have to report some issues with the robustness of the USB chargers that come with the Blackburn lights. I've had 5 chargers and 3 have died completely over time. Since they're proprietary, you have to buy more rather than use the chargers from your other devices.
Just bought two Lezyne Mini Drive XLs; we'll see if they can actually do the job.
**** Original Review Below ****
I owned multiple Blackburn Flea 2.0 headlight and taillights before upgrading to the Blackburn Super Flea for the front lamp. After trying a number of removable-battery type running lights for my bikes (Cat Eye), I move to the Fleas because I hated having to manage batteries. I've gotta say the rechargeable feature is absolutely killer and popping into a USB port is very slick. It's what prompted me to outfit all my bikes with Fleas, so I'd say I have pretty good experience with them. (Man, that sounds kinda weird)
The body is larger than the Flea 2.0 products, but still smaller than any headlamps with removable batteries.
1. No batteries! This was huge for me.
2. Brightness is perfect for dark roads. I have plenty of immediate and far-field visibility.
3. Very small & lightweight. Doesn't get in the way of anything and doesn't bounce around.
4. Very clean, well-made feel.
5. Charge indicator LEDs are brilliant.
6. USB charger cap is much-improved over Flea 2.0 models, as is the lifetime of the Super Flea.
7. Charge time is short. If you notice the battery indicator on orange, you can pop it in overnight or during your time at work and you're good to go when you want to leave. Also, if you notice the indicator at orange, you still have quite some time before you HAVE to recharge.
1. The mounting strap, while sufficient to mount the Flea securely, is a little too short for most handle bars and I had to trim all of the straps. Also, you have to take off the strap to recharge it. I'm not sure how to fix it, but it's mildly awkward given how slick this product is.
2. Price. This baby is a little expensive. It's been well-worth it, though. How much are you willing to pay for safety?
After using Flea 2.0s for some time, I upgraded to the Super Flea and all of my relevant issues with the Flea line went away, I'll try to update this review in a year or so to comment on the life of this battery, but I suspect that like most rechargeables, it will lose at lest 30-40% capacity within a year. Given it's current long life, I don't foresee that being a problem for me.