12S4P 20700/21700 FlexPCB 1.0 Battery Kit
12S4P 20700/21700 FlexPCB 1.0 Battery Kit

12S4P 20700/21700 FlexPCB 1.0 Battery Kit

Regular price $24.95 Sale price $19.95
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Note: NOT compatible with our 4p & 8p 21700 Nickel Tabs without trimming/modification. This PCB design was originally built for the Kaly XL 2.0 flex enclosure, so the slots are too narrow to accommodate our Nickel Tabs without modification. An updated design will follow that uses these tabs. 

This is an advanced battery building kit/component. This product is a DIY component provided as-is for now to advanced builders who know how these materials go together. Read up, get good. Don't start any fires.

Soldering, spot-welding. and li-ion battery building know-how required. 

Kit Includes:

  • 12S4P 21700 FlexPCB 
  • 25x 4p-21700 Nickel Tabs
  • 12x 4p 21700 Fishpaper RingStrips
  • 2x M5 Bush Terminal (175A rated)
  • 13-pin RA JST Header (Balance connector)
  • 2x M5 10-12awg Ring Terminals (100A)
  • 2x M5 14-18awg Ring Terminals (Balance)
  • 2x M5x10mm Socket Head Bolts
  • 1x Amass XT90S Connector set
  • 12x 100x70mm Adhesive Backed Fishpaper Sheet


    Specs & Dimensions:

    Usage: These 'FlexPCB's have a moderate ability to bend, within reason. Applications within high-flex decks (TRAMPA style, high-flex/low-ply MTB, etc) has not been tested extensively, do so at your own risk. 


    • Build Guide (for 18650 version, updated Guide coming)
    • Github Wiki link

    OpenSource Files:

    International Customers: Shipping options through built-in services are limited & somewhat expensive. Please email benjamin(at)duckbatterysystems.com, or Message us directly to discuss alternative, cheaper options.