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  1. #1
    Fat on Willand Pond
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    New question here. USB Port 1800lm CREE XML-T6 LED Bike - Need Power?

    I just received this headlamp from China off Ebay and was looking to get the best - lightest - most powerful power source to plug into. All this light has is a standard USB 3 foot cable and came without any power source. I was told that any power bank should work but was looking for suggestions. Please let me know what might work best. Also, just need the light to go for 1-2 hours on a single ride from the power source. Please advise.

    USB Port 1800lm CREE XML-T6 LED Bike

    Features:

    100% Brand New and High Quality.
    Specially designed with USB power port(5V),
    Perfect to be used with power bank (not included) so that you can totally get rid of the cumbersome battery carrying.
    CREE XML-T6 LED, maximum lumen up to 1800LM, ultra bright.
    Three Modes: High/Low/Strobe(by pressing the button).
    Durable aluminum alloy crust, abrasion resistance.
    Water resistant, can be used in rainy weather(but can not put it into water) .
    Equipped with rubber rings for easy installation.
    LED indicators.
    Suitable for cycling, climbing, fishing, hunting, camping and other outdoor activities.
    Specifications:
    Item Type: Bicycle light
    LED: CREE XML-T6
    LED Quantity: 1pcs
    Port: 1 x USB 2.0 male
    Working Voltage: 5V
    Working Currant: 2A
    Modes:
    High: 2000MA (Current)
    Low: 1500MA (Current)
    Strobe: 2000MA (Current)
    Lifespan: Approx. 100000 hrs
    Housing: Aluminum alloy
    Color: Black & silver
    USB Cable Length: Approx. 95cm
    Light Size: 5.3 cm x 4.3 cm(L x D)
    15 Moto Night Train
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    93 Raleigh MT 200

  2. #2
    mtbr member
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    never heard of that before. Getting rid of the "cumbersome battery carrying" seems a bit pointless when the light doesn't work without it. Then it becomes "cumbersome dead weight carrying".

    If you need a plug and play solution, there are stacks of 18650 powered battery banks/ power packs on Fasttech and eBay, both prebuilt units and empty shells that you can put your own cells into. Usually they're either 2 or 4 cells - more cells = longer runtime but more weight (generalising).

    Personally, I'd drop the gimmicky USB connection (unlikely to be either waterproof or all that secure) and wire in a proper sealed cable to use with a proper sealed 3.7V battery pack.

    A link to the light you bought would be useful too

  3. #3
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    I saw this type of light before and wondered why anyone would buy them.

    Here's a link to the same style of light
    $16.33 POLAR Cree XM-L U2 3-Mode 900-Lumen 6500K Bike Light / Headlamp - 10W / USB powered at FastTech - Worldwide Free Shipping

    At least it's cheap.

  4. #4
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    Quote Originally Posted by mattthemuppet View Post
    never heard of that before. Getting rid of the "cumbersome battery carrying" seems a bit pointless when the light doesn't work without it. Then it becomes "cumbersome dead weight carrying".

    If you need a plug and play solution, there are stacks of 18650 powered battery banks/ power packs on Fasttech and eBay, both prebuilt units and empty shells that you can put your own cells into. Usually they're either 2 or 4 cells - more cells = longer runtime but more weight (generalising).

    Personally, I'd drop the gimmicky USB connection (unlikely to be either waterproof or all that secure) and wire in a proper sealed cable to use with a proper sealed 3.7V battery pack.

    A link to the light you bought would be useful too
    well I guess that the target of this light is quite small, personally I already own a verbatim 10'000 mah power bank, very light, I keep it in the bike saddle and I can connect 2 usb devices (probably more if I get a usb hub), I don't need the light on a daily basis since I don't use the bike to commute, it's a leisure road bike, hence the reason why a cheap light is enough, it's currently sold at around 13.50-16.00 USD with free shipping.
    The main thing I'm worried about is the waterproofness of the light, I'm pretty sure it's quite poor.
    But I guess that for 13 bucks I can't complain, the only way of getting a proper waterproof light is going for the brand names like knog, niterider, but that would set you back of at least 50 bucks.

  5. #5
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    Quote Originally Posted by varider View Post
    I saw this type of light before and wondered why anyone would buy them.
    I see many advanteges.

    I had one 30$ chinese bike light with battery, and the light part was good, but the battery looked quite cheap and low quality, and worked for just half a year. So I bought new USB light for 15$ and good and powerful powerbank for 60$. This way I have excellent waterproof powerbank that will last much longer than the first battery, and excellent capacity of cca 5 hours on the highest (1000 lumen) level or even longer on lower one. Also, I can simple add cheap aditional USB cord and place this powerbank in a bag below my seat.

    Also, if the market offers better USB light (for example some flood light), I will be able to buy it without need for a new battery.

  6. #6
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    How many amps can a power bank deliver via the USB connection? USB is usually limited to about 1 amp IIRC. If that is the case with the powerbank then you are limited to ~5 Watt lights.
    GoPro adapters for bike lights http://www.pacifier.com/~kevinb/index.html

  7. #7
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    This light doesn't work if output is below 2A, I guess that is the answer to your question?

    This particular light is strong enough, but the main beam is very narrow, but I'll buy better one if it shows up on the market...

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