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Repair and troubleshooting information for the FixHub Portable Power Station, the primary power source and control interface for iFixit’s FixHub product line. Released in October 2024.

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FixHub battery - replace cells

I purchased this station when it first came out. it sat in a drawer for eight months. it was 90% charged or full when i did so. when pulling it out, it was dead. I was reading less than 2V from the cells.

Replacement battery packs were sold out here so i bought a DIY spot welder and six Molicel batteries. I replaced the cells and tabbed it the same way i saw it when i disassembled. I can read 4V from pos-to-neg on each cell. they all have the same chemistry (i drain/charge checked them).

I get 2.0V across the terminals/connector but I can't get the power station to come up.

I was able to hard reset the station and upload the latest firmware (1.4.3 at this time, i believe).

Is the BMS on the battery dead? is the pack not serviceable?

I would've just bought a replacement pack and called it a day but I'd like to try and salvage something from my attempt here.

Any info would be appreciated. Thanks.

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After looking at photos and reading the label I previously misplaced, I realise I'm not getting the right voltage because I didn't wire the batteries correctly (the centre two inverted)! I had a moment of derp. Completely disregard my original post.

the battery pack should .. 10.8V 56Wh 5200Mah

NOTE: here is a diagram.

.
.  
                                                         
                                                         
        ┌───────────────────────────────────────────────┐
      ┌─┤             ┌──┐                    ┌───┐     │
      │┌┤             └┐┌┘                    └┐ ┌┘     │
      ││└──────────────┤├──────────────────────┤ ├──────┘
      ││    ┌──────┐   ││    ┌──────┬──────┬───┤ ├───┐   
      ││ ┌──┴──┐┌──┴──┐││ ┌──┴──┐┌──┴──┐┌──┴──┐│ │┌──┴──┐
      ││ │  +  ││  +  │││ │  +  ││  +  ││  -  ││ ││  -  │
      ││ │─────││─────│││ ├─────││─────││     ││ ││     │
┌───┐ ││ │     ││     │││ │     ││     ││     ││ ││     │
│(-)│◄┘│ │     ││     │││ │     ││     ││     ││ ││     │
├───┤  │ │     ││     │││ │     ││     ││     ││ ││     │
│(+)│◄─┘ │     ││     │││ │     ││     ││     ││ ││     │
└───┘    │     ││     │││ │     ││     ││     ││ ││     │
         │     ││     │││ │     ││     ││     ││ ││     │
         │     ││     │││ │     ││     ││     ││ ││     │
         │     ││     │││ │     ││     ││─────││ ││─────│
         │  -  ││  -  │││ │  -  ││  -  ││  +  ││ ││  +  │
         └──┬──┘└──┬──┘││ └──┬──┘└──┬──┘└──┬──┘│ │└──┬──┘
            │      │   ││    │      │      │   │ │   │   
            │      │   ││    │      │      │   │ │   │   
            └──────┴───┴┴────┴──────┘      └───┴─┴───┘

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A portable power station's battery power output is the amount of electricity it can deliver, measured in watts. This determines how many devices it can run as well as how long it can run for.

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1 Comment:

I don't see how this is helpful. Are you asking a question or providing some sort of instruction? Is this a bot/spam?

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