SecurityIng® Waterproof 3 Modes 1200 Lumens LED Bicycle Light Super Bright Bike Headlight LED Lighting HeadLamp with 8.4V Rechargeable Battery Pack and Charger

It is bright! Very Bright! The light seems to be manufactured well. The pouch to hold the battery is not. It only has 1 strap and the one I have is not stitched correctly so it is only held on by half as many stitches as it should. I have only had it a few weeks. I will update this post as needed. It also does not come with a helmet mount. It comes with a head strap to wear it on your head without a helmet.

Over the last two months, I reviewed what appears in almost every way to be this exact same package from the same maker and seller (SecurityIng and ePathDirect). This offering also has near-identical photographs, same box, etc.. The two differences are 1) this battery pack claims only 4400 mAH whereas the other package claimed 6400 mAH and 2) the ring around the lens is a different color. After one month, the system I reviewed suddenly degraded to less than 25% of it's original capacity, then at two months it suddenly failed completely (only 8 minutes on "LOW"). See the review here: http://www.amazon.com/review/R3GH04ZFPVWZK9/ref=cm_cr_pr_viewpnt/189-8714910-9080365#R3GH04ZFPVWZK9It looks like the happy coincidence of a color change and a battery pack "downgrade" was that a set of reviews that also apply to this product got hidden. Most of those reviews were your standard glowing first impressions. One (mine) was a long term review that started out "good" then ultimately turned very "bad". That review had been labeled "most helpful" there if that means anything to you. I'm posting it again here so you can know the pertinent fact of the failure of ONE of the samples (as well as the other more positive aspects). I don't know how statistically significant the failure is, but there it is. The product was indeed great for the price until it stopped working.~~~~~~~~~~~~~~~~~~~~~~~~~~~~Here is an edited-down version of that review of what is essentially this very same product by the same maker and seller:On 3 October 2013, I bought the "SecurityIng Waterproof 1200 Lumens CREE XM-L T6 4 Modes Headlamp & Bicycle Light + Battery Pack" ( B00ANH2Q7K  "By SecurityIng" "Sold by ePathDirect" "Fulfilled by Amazon" I paid $25.68 total.The item arrived packaged well by Amazon. The item came in the same kind of box shown in the pictures. Everything shown in the pictures was included in the box. Nothing else was in the box except a cardboard separator. The objects in the box were not wrapped in plastic except for the two O-rings. No other paper was in the box, no instructions of any kind. There was nothing printed on the rest of the box other than what you can see in the pictures (except for one "Securitylng" on one other side).Fresh out of the box (before charging the battery) I plugged the light into the battery and the light did not work (which is not unexpected of course). I plugged the battery charger into the wall and its green light came on. I plugged the battery pack into the charger and the light turned red. After about an hour I tested the lamp again. When I plugged the lamp into the battery pack the green button-light came on and the lamp seemed to work in all its modes. The strobe mode required holding the button down for a few seconds. I resumed charging and after about two hours the charger light turned green, presumably meaning a full charge (but I wouldn't know without instructions). The charger says "8.4v, 1000mA" which is consistent with the advertised specs.Beware the green-lighted button! I'm told it has a significant "parasite" draw on the battery and it's a good idea to disconnect the lamp from the battery between rides.The headband supplied is very small and tight even when adjusted to its maximum size. It rides high because the top strap is also short. If you plan to use the strap, you might feel the need to modify it to make it bigger.There is no way to aim the light left and right -- normal for this style of low-cost super light. This could be a problem if your handlebars have any kind of sweep to them. This kind of adjustment is also good to avoid blinding oncoming bikes on a bike path.The lamp is very bright as all of this type are. I don't know if it is really 1200 lumens, but it's much brighter than my current 100-lumen lamp. It's a pretty good deal for something that can extend my riding day and maybe save my life.I'll report back on my charge-duration experience and other observations as they accrue.UPDATE 1:After one night ride. I started with a "full" charge as indicated by the green light on the charger and rode for an hour on maximum. It lasted at least that long. The brightness of a "1200 lumen class" light vs. a "100 lumen class" is a major MAJOR enabler. I can go full speed now (~20 mph) on the otherwise pitch black unlighted bike path. Before, I had to slow down and really pay attention as to what was emerging out of the blobs at the limits of my old (100 lumen) light. I found that I could point the thing a few degrees left or right just by the slop in the mounting system (which is good). It is totally necessary to shade the light with your hand to keep from blinding oncoming bikers. As they get closer, they're not in the main beam anymore, but the peripheral beam is still bright enough up close to send them careening off the path or right into you.UPDATE 2 (after Day 3, Ride 2):I started out with a "full" charge (as indicated by the green light). It had been about 18 hours since unplugging from the charger. The ride lasted about 1.5 hours with the light in low or strobe for the first 30 minutes then on high for the rest of the ride. The button light remained green the whole ride and the light worked the whole ride. I had trouble with the light pointing slightly downward with each bump. After each few minutes of riding or after each slightly bumpy section, I needed to re-aim the light upward. I was using the small O-ring which was quite tight to put on. The mount seemed quite tight too, but the bumps still jiggled it downward. The design has the weight too far forward in my opinion. This is typical for this type of light.UPDATE 3 - FAIL after one month.After about one month (~10 rides) of use, on one ride the light suddenly shut off after about 35 minutes on HIGH. I had been in the practice of using it on HIGH for up to 1-1.5 hours, then charging it fully after each ride, then topping it off just before the next ride. To prevent drainage by the green "ready" light, I never left the battery plugged in to the lamp when not actively using it. The ride where it shut off after 35 min was the first cold ride, about 40 degrees F. When I got home, I wanted to test it to make sure it wasn't temperature related. At room temperature I charged the battery fully again and ran it on HIGH until it shut off - which was again at about 35 minutes. I've ridden a few times since then, now with the light on LOW I can expect about 2 hours before shutdown.It seems most likely to be the battery, but it could also be the charger or the lamp. Both the charger and the lamp have unknown logic in them. The charger may be shutting the charging down too soon so the battery is not actually getting fully charged. Or, the lamp may be shutting off too soon in its attempt to take good care of the battery. These batteries are also notorious for "variability" in quality within and across brands. Whatever the source of the problem, at this price point we come to expect unreliability, and indeed unreliability is what happened here. I downgraded the rating from three-stars to two stars.UPDATE 4 - Complete fail after two months.I had settled into a "two hours on low" routine. I was happy that at least I was able to get one ride's worth of reasonable brightness out of it. Then today it shut off after only about two minutes on low. When I got back I tested it with a sequence of full "red light turns to green" charges. Each time the charge time was only a few minutes until the green light and each time the light shut off in less than eight minutes on low. I suspected the charger might be showing green, but still trickle charging. So, I left it plugged in for about an hour and a half after the green light came on. Still the light lasted no longer the the previous tests.So, now the system is completely failed. It doesn't even have any kind of reduced usability. What can I say now? This item is over and done for me. About the only thing it was good for was giving me a taste of how valuable a very very bright light is for a bike. Something like this should have lasted at least a year with perhaps only marginally degraded performance during that time. This product fell far short. I would have downgraded to zero stars if I could go that low.RESOLUTION:The light first degraded noticeably at one month, then failed completely at two months. I noticed that ePathDirect's return policy was 30 days. I thought I might be able to negotiate a return with them anyway if I could call or email them. I couldn't quickly find their contact information on the Amazon site, so I called Amazon to try to find contact info for ePathDirect (or "SecurityIng" or whomever). I explained the situation to Amazon and they quickly offered a full refund with return postage paid by them. There was no need to follow through with ePathDirect. That was nice because it saved some time and effort and potential agony. So, ultimately I got awesome financial satisfaction without any fuss or muss. (Good job Amazon.)DISSECTION! (Dec 5 2013)Amazon told me also that I didn't have to send the carcass back. Since it wasn't working at all and I didn't have to return it, I had nothing to lose by trying to fix it, so I went to work. When "charged" (red-to-green on the charger), the battery pack showed about 7.4 volts. I opened up the battery pack. It was (2-in-parallel) in series with (2-in-parallel). I was surprised to find a little circuit board also inside.The board had a conductor going to the node between the two series-ed (2-in-parallel) packs indicating its purpose was to balance the pack. Testing with the voltmeter during charging and discharging gave evidence that the board was also a protection circuit. When the pack was "charged to green light" and showing the 7.4 volts, one set of (2-in-parallel) cells was showing a much lower voltage than the other -- meaning the pack had become unbalanced. I tried a few charging-discharging cycles and the imbalance remained.Given what I was able to observe during the dissection then reconstruction (of two smaller packs), my hypotheses is that the balancer/protector circuit in the battery pack failed to balance. Then, the same board's protection function cut off the charging at 7.4 volts to prevent over voltage on one of the 2-in-parallel "cells". Then during discharge, the balancer/protector circuit cut off when the total voltage was about 7.0 volts. 7.0 volts seems high for cutoff, but the balancer/protector circuit may have been trying to protect the lower-voltaged side of the unbalanced two 2-in-parallel "cells" in series. That drain from 7.4 volts to 7.0 volts happened pretty quickly perhaps due to the imbalance condition.~~~~~~~~~~~~~~~~~~~~~~~~~~~~