Electrical – bypass these two adapters

adapterinverterplugpowerpower supply

Scenario

I have a LiPo battery connected to a DC > AC inverter and these two adapters (images below) are plugged into the inverter.

Hypothesis

Everything runs fine currently but I know I'm losing juice in the conversion back and forth. Cutting out the DC > AC inverter, AC > DC adapters, and running power straight from the ~12v battery to the 12v devices should work.

Question

The LiPo fluctuates from 12.6v (full charge) to 9v but my shut-off alarm is set to 9.9v. Are there any caveats here? The first adapter from "FSP Group Inc." is for an "Nvidia Jetson TK1" computer so I'd hate to fry that.

Extra

What is the name of the plug on the "FSP Group Inc adapter"? I'd like to buy a separate one instead of cutting that one off the adapter.

LiPo Specs

  • 11.1v
  • 6500 mAh
  • 20C

nvidia jetson tk1 power adapter
kinect powered usb adapter

Edit – Power Consumption

Jetson TK1 Power Consumption link

  • Booting up: ~3.6W (for ~2 minutes booting)

  • CLI via SSH: ~1.6W

  • Heavy Disk Usage: 1.6W – 4.7W

  • Input Range: 9.5v – 13.5v

Microsoft Kinect Power Consumption link

  • 12 watts

  • Input Range: 8.5v (~0.42A) – 12v (~0.35A) link

I'm surprised to see that the kinect requires so much more than the computer.

Best Answer

Yes I can

  • LiPo 11.1V DC (12.6V-9.0V) to
  • DC/DC Boost Converter Step-up Voltage Transformer 3-34V to 4-35V 6A Volt Regulator Controller (set to 12V DC output) to
    • Male DC Power Pigtail Plug to Computer (Jetson TK1)
    • I cut off the "DC connector" from the AC adapter for the Kinect's powered USB cable and connected + - of exposed wires direct Step-up Converter.

Note: I couldn't get the Kinect to have sufficient power when going through the transformer so I left the computer on the transformer and connected the Kinect straight to the LiPo since the Kinect supports ~9V-13V DC

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