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DROK Ultra small 3V-5V, 5V Output DC Boost Drains Batteries 2016-11-09T16:02:47+00:00

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Viewing 4 posts - 1 through 4 (of 4 total)
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  • Cole Diamond
    November 9, 2016 at 4:02 pm
    Post count: 0
    #10447 Reply |

    Hello,

    I recently purchased the DROK ultra small 1-5V to 5V output with USB.
    When i place the inputs to this chip from a bench mounted variable power supply going directly from the supply to the chip it will light up its LED, and show a charging symbol on my Samsung S6 from 1V to 5V.
    However the current delivered is very low bouncing from 20mA to 100mA max.

    Next when i attempt to hook it to my battery packs, going directly from my battery packs which are 4.8V 4.5aH NiCD packs. My battery pack went from 4.5V down to 0.7V within one second, when i removed the boost circuit from the battery it slowly climbed back up in voltage over 10-15 minutes.

    My question is do i need some sort of resistor before to regulate the draw from the batteries, and the current delivered to the usb,

    I would ideally like to put in anywhere from 3V – 5V from my NiCD cells, and have it output anywhere from 500mA to 1A

    Thank you for your time let me know if you need any extra information.

    Cole Diamond

    Drok
    Keymaster
    November 10, 2016 at 1:23 am
    Post count: 2971
    #10458 Reply |

    Hello Cole Diamond,
    Thank you for writing in.
    Could you please tell us your order ID or the link of the product so that we can ensure which product you have bought?
    With your help, we can find a solution more quickly.
    Waiting for your reply.
    Best regards

    Cole Diamond
    November 14, 2016 at 4:12 pm
    Post count: 0
    #10577 Reply |

    THANK YOU FOR REPLYING,

    My part purchased was this one off amazon.ca

    https://www.amazon.ca/Module-Battery-Converter-Charge-Samsung/dp/B00C93Z8JY/ref=sr_1_1?ie=UTF8&qid=1479139867&sr=8-1&keywords=ultra+small+dc

    Thank you in advance, i would like to find a solution to this issue.

    Drok
    Keymaster
    November 15, 2016 at 2:30 am
    Post count: 2971
    #10585 Reply |

    Hello Cole Diamond,
    Thank you for your reply.
    This problem may be caused by the internal resistance of the battery pack is too large.
    And it may be caused by the over-current protection of the battery and the protected current is very low.
    Could you please use 3.7V lithium battery to check if it can work normally?
    Besides, NiCD cells can work for this product. But if you want 500mA to 1A output current, the output current of the power supply should be more than 3A.
    Hope this can help you.
    Best regards

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