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LED fix in 10000mAh Mi Power Bank 2S

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  1. LED fix in 10000mAh Mi Power Bank 2S, Tools used in disassembly: шаг 1, изображение 1 из 1
    • Mi power bank disassembling required a semi-soft and flat prying tool for back plate removal and Phillips #0 and Phillips #000 size screwdrivers. You can use a metal spudger to slide in the internal frame if needed. iFixit Essential Electronics Toolkit includes all of the essential tools.

    • The nut driver in the photo isn’t usually required. I used it to press the bent aluminium case corner back into shape when the internals were pulled out.

  2. LED fix in 10000mAh Mi Power Bank 2S, Disassembling: шаг 2, изображение 1 из 2 LED fix in 10000mAh Mi Power Bank 2S, Disassembling: шаг 2, изображение 2 из 2
    • The top and bottom covers are fastened with double sided tape. Insert prying tool near the middle of the bottom cover where the model name is shown. Slide it around cover to loosen the tape.

    • The bottom cover has two small pins at the back side near each end. Carefully press one of them with the prying tool towards the center to free that side. Repeat the same action for the other side and then remove the cover.

    • Remove the two screws at each corner with the Philips #0 screwdriver.

    • Turn power bank with sockets to bottom direction. Slide and pull the internal frame out. If the internal frame is stuck, press several times in the middle of the case and along the case length. Jimmy knife or metal spudger can be used carefully to free the front side plate from outer case.

    • My device had a slightly bent corner at the top side near the button as result of dropping damage. The bent metal prevented the removal of the internal frame. In order to free it for removal, it was necessary to remove the taped cover and button (it has the same pins as the bottom cover, be careful) The bent metal was restored by pressing it down.

  3. LED fix in 10000mAh Mi Power Bank 2S, Separate components from frame: шаг 3, изображение 1 из 3 LED fix in 10000mAh Mi Power Bank 2S, Separate components from frame: шаг 3, изображение 2 из 3 LED fix in 10000mAh Mi Power Bank 2S, Separate components from frame: шаг 3, изображение 3 из 3
    • The charge controller circuit board is fastened to the frame with two small screws and two pins at the sides. Remove the screws with the Philips #000 screwdriver. Carefully press fixing pins to release the board.

    • Battery is glued to frame with weak glue. Use prying tool or spudger to loosen the battery from the frame.

    • Pay attention to temperature sensor which is attached to one battery side with kapton tape. Don't tear it off on battery removal.

    • After component removal from the frame, the failure cause became clear. The negative battery terminal was torn off of the controller board. It may have gotten stressed on assembly and tore later on impact from dropping onto pavement or other hard surface. The battery was measured at 4.1V (nearly full).

  4. LED fix in 10000mAh Mi Power Bank 2S, Fix teared battery terminal: шаг 4, изображение 1 из 2 LED fix in 10000mAh Mi Power Bank 2S, Fix teared battery terminal: шаг 4, изображение 2 из 2
    • Remove the bent battery terminal metal piece from the controller board battery pad. If removal of the bent piece is not possible, then flatten the bend. Drop a solder blob over the pad.

    • Put solder on end of battery terminal strip. Keep temperature between 250..270C degrees.

    • Lithium batteries degrade in heat. Put solder on battery terminal strip fast as possible.

    • Bend battery terminal strip with tweezers in slight "U" shape. It will put less stress on on strip while bouncing around.

    • Solder battery terminal to controller board pad.

    • Soldering the bent / torn battery terminal solved the flickering LED issue. The power bank now can charge a phone and itself.

  5. LED fix in 10000mAh Mi Power Bank 2S, Assembling: шаг 5, изображение 1 из 1
    • Assemble power bank back in reverse order. Install controller plate and battery back in frame.

    • For the battery installation, try to place it in a position where the terminal strips are not stressed. It may prevent damage requiring disassembly should an accidental drop occur.

    • Insert the assembled internal frame into the outer case. Screw it back down with the two #0 screws. Set the cover back into place.

    • The back cover has only one possible orientation. There are two protrusions at the back side while the outer case bottom has two holes to receive them. See the photo.


Xiaomi Mi Power Bank 2S appeared easy for basic repairs. Glued parts are easy to remove and they stick back just fine. Internals are fixed by screws. Other Mi USB power banks from 2 line (2c, 2i) are built in same way.

Described USB power bank have good charging capacity and is easy for everyday use. Keep in mind that design is not rugged and battery terminals inside are thin metal strips. Try to avoid dropping it on hard surfaces. Kid admitted that he droped his power bank several times - hard to hide dents at outer case corners :)

3 участников успешно повторили данное руководство.

Jānis Baumanis

Участник с: 03/29/19

211 Репутация

1 руководство автора

3 Комментариев

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Tech Mann (new) - Ответить

Pretty straight forward tutorial, I wish i had the tools to repair it, I have it since 2018, never really used it, and now when I tried to charge it , the lights blink for a sec and then nothing. I wish I could get a replacement for free but the warranty has expired since 2019. I will probably take it for recycling unless I find someone to give it to.

TechBlade 47 - Ответить

Lithium batteries self-discharge during a year or two. Few years without charging obviously left power bank with battery voltage so low that charging controller refuse to charge it - it have upper/lower voltage treshold and normally doesn't operate if voltage is too high or too low. There is no other way than disassembling and charging the battery from outer 3.4V voltage source with controlled current level - like laboratory power supply. When battery is charged to 3.4V in such way, original power bank controller will be able to charge it completely again.

Jānis Baumanis -

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