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OK, deadline finished, so lets polish off the rest of this DC guide.


Here's the list of what the DC system looks like:

  • $85 - HDPLEX HiFi 250W DC-ATX (nanoATX Series)
    • if you buy directly from them (they have a CA warehouse), request the appropriate PCIe power connector (by default it comes w/ an 8 & 6+2, but you probably want a 6 & 6)
  • $61 - HP Firebird 350W Power Supply
    • When you don't feel like plugging in a battery
  • ~$10 - 7.4x5.0mm DC Male Barrel Connector to Male XT90 Connector
    • I feel a bit conflicted on recommendations. For expediency, I Amazon Primed a cheapy $8 power brick, chopped it off, and soldered it to an XT90 connector ($10/5), but this is certainly not rated for more than 5A. Nothing you can readily buy (save for chopping up another 350W power supply) seems to be, however...  I have some 10AWG XT90 cables, but those wouldn't solder well
    • Your best best might be to buy a plug (here or here) and and solder w/ a 12 or 14AWG wire (guide, guide). If this is too daunting, you may want to talk to an Electrician friend, I couldn't find anything off the shelf
  • $4 - XT90 to Banana Plug charging cable
    • Of course this may be quicker/easier to just make your own if you already have your soldering iron out.
  • $8 - Battery Voltage Checker/Alarm (alternative)
    • Put these on your JST-XH plug to alert you to when your power is too low
  • $103 - MultiStar High Capacity 6S 12000mAh LiPo
    • You can of course buy any capacity you want, keeping in mind that the max continuous discharge for these guys is 10C. You won't find anything remotely close in price to this, btw (the Tattu 12000mAh 6S's for instance are $200)
  • $115 - Ultra Power UP300AC Touch AC/DC Charger
    • $105 if you're not in a rush for shipping.

If you've followed along this far, all the caveats, or why you might want to choose one thing or another should all make sense. If not, please ask away.  I will be spending this week at a conf, doing an SSD migration (moving from my old 256GB Plextor M6e to a new and shiny 512GB Samsung 950 Pro on this system)  and also putting together the actual backpack part of the system, so that'll be my installment.