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  • posted byJunglemike on 07/07/2013

    Great dc-dc. It gives approximately 500ma, If you try to increase the current consumption - the voltage drops. Efficiency is 82% (calculated by me) when supplying 500ma, and Vin=3.8V. You can put 2 or more of these in parallel to get very fast and efficient phone charger. Requires knowledge of electronics ... Read more

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  • posted byGreenTechNetwor on 07/01/2013

    I've tested this module with a few devices and can confirm it works with the following: Most android phones Most non smart phones Most USB devices I've ran it for over an hour during tests. My phone pulls about 1A while charging and the module was only slightly warm. It could probably handle 1.5A if ... Read more

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  • posted byTrisMcKee on 03/04/2013

    -Fairly solid build quality -Red LED confirms circuit is working -All solders look good to me -Works with many different batteries -Delivered a good 4.9-5v -Very small -Solid USB connector -Wasn't powerful enough to charge my ipod touch (4th gen) or Nexus 4, however was able to charge my iPod video (... Read more

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  • posted byrelic38 on 12/04/2012

    - Small, easy to use - Stays cool enough to put in an enclosure without worrying about overheating - LED is on as long as power is applied; cannot be used to indicate charging is active. This may or may not be a bad thing. - The top of the coil chips easily, however this does not appear to affect the ... Read more

    Minor coil chip; no concern, still functions fine

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  • posted bymarcosh72 on 11/22/2012

    - Really works; - Fine regulated out, it's pretty accurate 5v; - You can recharge your phone or whatever from a single AA battery or any other supply, like a solar panel; - It's small; - Fits everywhere, seems great to embedded projects; - It's hard to attach it to a box or anything like this, because ... Read more

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  • posted bymetal03326 on 10/03/2012

    - It's cheap. - It has good build quality. - It's small. - Voltage drops when heavy load is applied. - The LED mounted on the board cannot be switched off to save precious milliamps when needed. I bought this for my solar panel (3.4 volts at 40mA) to experiment. My expectations were this thing to supply ... Read more

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  • posted bysamkosamko on 09/24/2012

    Very good dc-dc step-up converter. I use it for powering my smartphone when use hiking navigating software. I bought a 18650 battery holder case to power this module. It is possible to power module from any battery, but then input current will be higher. Usefull as a DIY emergency battery for USB powered ... Read more

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  • posted byPolonium on 09/13/2012

    Great gadget for a very reasonable price. I use this step-up booster to transform the voltage of 3 solar panels (about 1.5V) to 5V. The current however is insuficcient to charge my smartphone. Most other devices charged well. (I think maximum current at 1.5V input is about 500mA) Difficult to attach ... Read more

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