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I am working on a project, and am required to build an autonomous glider (no propulsion).

Weight is limited to 9oz, and we are using the Pixhawk 4 mini for flight controls. The power management board (PMB) that came with the package only has XT60 plug, so it does not fit with the small batteries that I have.

Any recommendations on what I can do? I am considering de-soldering the XT60 plug on the PMB and solder a red JST plug. Is this safe to do?

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    \$\begingroup\$ PMB? But yeah, changing connectors is normal. \$\endgroup\$
    – DKNguyen
    Commented Nov 19, 2019 at 16:33
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    \$\begingroup\$ It would only be unsafe if your skills aren't up to the task. Since we know nothing about you, there's no way we can answer that for you. \$\endgroup\$
    – Dave Tweed
    Commented Nov 19, 2019 at 18:04

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The XT60 connector is rated for 65A continuous (per Sparkfun). JST is a manufacturer that makes lots of different connectors. In model aircraft and RC hobbies, I believe the JST SFH connector is quite common. This connector is only rated for 4A.

It sounds as though you have a small battery (assuming a single cell LiPo?) and a power management board that could potentially be used for much larger projects. In that case you should be OK replacing the XT60 with a smaller connector, as long as the project is never going to draw more than the connector's rated current.

If you later re-purpose the PMB for a different project, and it needs more current, don't use the under-rated connector!

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