Battery pack hardware for DIY builders

Sodium-ion and LFP cells, flexible busbars, compression plates. US stock, ships fast.

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Find the parts that fit your battery

Pick your cell chemistry and pack voltage. The Component Selector shows the busbars, compression plates, BMS, chargers and build guides that fit, with the right size already selected.

1. Cell chemistry

2. Pack voltage

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Free, no sign-up. Change cells, series count and current on the next page.

Battery pack parts for DIY builders, labs and startups

OGS stocks sodium-ion 18650 cells, LiFePO4 prismatic cells, insulated flexible copper busbars, compression plates and pre-programmed chargers, tested on our own bench in Michigan. Not sure what fits? The Component Selector matches parts to your chemistry, cell and pack voltage.

Trusted by researchers, builders, and innovators

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BMS & Balancers 4S to 16S

Ships from Michigan, USA Seplos, JK, and Daly battery management systems (BMS)...

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Books & Resources

  • How to Spot Weld 18650 Cells (and Why Not to So...

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    A spot welder and pure nickel strip are the right way to join 18650 cells. Here is how to find the right weld setting, test every joint, and insulate the...

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    Joseph O'Connor

    A spot welder and pure nickel strip are the right way to join 18650 cells. Here is how to find the right weld setting, test every joint, and insulate the...

  • Is Sodium-Ion Right for Your Build? Cold, Safet...

    Joseph O'Connor

    Sodium-ion cells handle cold and abuse better than lithium, and they cost less per cycle. They also carry less energy per kilogram. Here is who they suit, who they don't,...

    Is Sodium-Ion Right for Your Build? Cold, Safet...

    Joseph O'Connor

    Sodium-ion cells handle cold and abuse better than lithium, and they cost less per cycle. They also carry less energy per kilogram. Here is who they suit, who they don't,...

  • Sodium-Ion Pack Math: Voltage Window, Series Co...

    Joseph O'Connor

    Sodium-ion cells charge almost as high as lithium-ion and drain far lower. That wide window decides your series count, your wire size and your BMS settings. Here is the math...

    Sodium-Ion Pack Math: Voltage Window, Series Co...

    Joseph O'Connor

    Sodium-ion cells charge almost as high as lithium-ion and drain far lower. That wide window decides your series count, your wire size and your BMS settings. Here is the math...

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    Battery Management Systems (BMS) are essential components in any DIY energy storage system, offering critical features like cell monitoring, balancing, and protection against overcharge and over-discharge. With so many options...

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    Battery Management Systems (BMS) are essential components in any DIY energy storage system, offering critical features like cell monitoring, balancing, and protection against overcharge and over-discharge. With so many options...

1 of 4