Recent content by ArminVanBuuren

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    7x CREE lamp - max voltage

    Thank you very much for taking your time to reply. I disagree with you, in some points, however. I use this device (only uses 6 cells, not 8x 18650)...
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    7x CREE lamp - max voltage

    https://www.ebay.com/itm/12000LM-SecurityIng-7-x-CREE-XM-L-T6-LED-3-Modes-Bicycle-Bike-Headlamp-Headlight/282558122605?hash=item41c9c6ca6d:g:7bwAAOSw3YJZXLpc Hey, I've got the above headlamp and tried increasing the default voltage from 12 V up to 19 V. It still seemed to work very fine, and...
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    Test/review of Vapcell INR18650 2000mAh (Black)

    Thanks.
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    Charging Li-ion to 4.1X v

    My i4 on the other hand charges it to 4.25v. Is it lethal for the battery, or is is still ok?
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    Power bank for charging laptop (6x18650)

    Hey, do you think this DIY power bank is good and sufficient enough for charging a 11.1V laptop? Will it really work, or is it just Chinese crap with cheap electronics that wont last? https://m.aliexpress.com/s/item/32271240682.html?spm=a2g0n.search-cache.0.0.45511214RVmi3X#autostay If so...
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    How to connect battery's pole to DIY power bank electronics

    Thanks a lot for the reply. So what would you recommend? Any chance to do it in home conditions? Wow, I haven't thought of this one! This one sounds good. Would you have more info on this one? Such as, why is it needed to be done immediately? Why can't I do it myself? And also, do I need a...
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    How to connect battery's pole to DIY power bank electronics

    Thanks for a fast reply. Frankly, I haven't much considered the heat issue to the battery pole. I have already tried soldering it beforehand (see the photo). However, the problem is not fire of the battery, but the fact that the contact is not good enough. It simply does not work (only when I...
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    How to connect battery's pole to DIY power bank electronics

    Hey, I have this 1x 18650 single cell power bank electronics. It, however, came with a very weak battery. So I removed it and would like to replace it with a 3400 Panasonic. However, I don't know how to connect it to it! I tried soldering it, but it it dosn't work (I don't know why, but there...
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    DIY Power bank for 18650 PROTECTED battery with sufficient space for it

    The first link would be really perfect for 4 cells. However, I'm looking for 1-2 cells at most. I want it to be small, compact. Would you suggest any similar to it? I tried similar brand and searched "e4c soshine". Although it comes from the same brand, people on Amazon write they're...
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    Cheap Chinese rear light, but powerful

    Hi, is there any very powerful cheap Chinese light? Like for daytime use? I really like PDW Radbot 1000. Its output should be 1 W, sufficient for daytime use. However, it ain't available in my country (Europe) and also, it's quite expensive. Is there some similar product but Chinese? I often...
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    DIY Power bank for 18650 PROTECTED battery with sufficient space for it

    Thank you for fast replies. Glad these are out there as well. However, how do I know if the space inside is big enough for a protected 18650? For example, this one looks very similar to Tomo V8-2...
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    DIY Power bank for 18650 PROTECTED battery with sufficient space for it

    Please help in in desperate search for a power bank from eBay that would have SUFFICIENT space inside it for a protected 18650 Panasonic. Unlike the rated battery, this one's length reaches up to 69-70 mm. I have already purchased many different kinds of DIY power banks from eBay (China)...
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    Help manufactur CREE LED for beer glass

    Would it be possible to (in some form) mount a CREE LED to a beer glass? I would love to have that glass enlightened from the bottom to highlight the beautiful color of beer. There would have to be some stand for 1x 18650 Panasonic 3400 mAh + 1 CREE diode, such as...
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    Intellicharger i4 hot during charging 4x 18650

    Does your Intellicharger i4 not seem quite hot during charging? I charge mostly 4 cells of type 18650, and although it's only supplied current .375 A, both the charger and batteries get hot. Not too much, that you wouldnt hold ur hand on it, but still its pretty hot. I charge them with using...
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    Is there a flashlight that fully utilizes CREE XM-L T6 LED (3A)?

    What is the maximal lumen output that HC50 can get without having to be pressing the "TURBO" button? Ie. what's the brightest continuous mode?
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