Portable power supply
Portable stabilized power supply
Powered by the battery of the DJI Mavic Air 2

Output voltage: 0.0V - 30.0V
Maximum output current: 5.0A
Battery input voltage: 10.0V - 13.05V
Maximum battery input current: 15.0A
USB input voltage: 5.0V
Maximum USB input current: 2.0A
Only for use with the DJI PB2-3500mAh-11.55V battery
If you need to use other types of batteries, you can modify the model of the battery holder.

Complete equipment video overview:
https://www.youtube.com/watch?v=6uv3i3wpUrU

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Materials used and example links:

XT60 connector
Estimated cost: $3
https://a.aliexpress.com/_EJa03bJ

Probe crocodile clip adapter:
Estimated cost: $2
https://a.aliexpress.com/_Ezfl2b3

Multimeter probes:
Estimated cost: $6
https://a.aliexpress.com/_EzXuC3j

DJI Mavic Air 2 battery
https://a.aliexpress.com/_EQcq9pL

It can be equipped with an XT60 connector
Estimated cost: $2
https://a.aliexpress.com/_EIKCiL7

Power module
Estimated cost: $17
https://a.aliexpress.com/_EwiW4zr

Battery blade connector
Estimated cost: $3
https://a.aliexpress.com/_EIiGpp3

3S lithium polymer USB charging module
Estimated cost: $2
https://www.aliexpress.com/item/1005005356623076.html

Screw kit
Estimated cost: $2
https://www.aliexpress.com/item/1005004264859389.html

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Total estimated cost