(tr)uSDX Battery Back for Quansheng UV-K5 batteries

Existing battery solutions seemed clunky to me so I designed a battery back that utilizes the Quansheng UV-K5’s batteries. These are readily available on AliExpress and next to the original Quenshang one, I'm using 3600mAh batteries that also have USB-C charging sockets.

Of course, these batteries are 2-cell ones, delivering only around 8V or so so output power will be (even more) limited. Still, I'm happy with my new short-wave handheld and am looking forward to experiment more with it.

For printing you will need supports but it's really not too terrible. Make sure to check "don't support bridges" and use "snug" supports to improve the supported surfaces.

For battery contacts, I'm using small 3.5mm long pogo pins: https://de.aliexpress.com/item/1005007499045682.html
This is very nice but not strictly needed. During testing I used some glued in wire bent into a little hook which worked fine - just make sure these can not short out even when being bent by accident.

I connected power by tying into the 12V rail available on the RF board (see picture). This makes for a very nice no-wires setup but also means you have to remove the battery to fully power off (or rely on the truSDXs standby mode).
Alternatively, you could go out through the side (just make a hole in the slicer) and use the regular power connector.

Update v2: I've added a version that allows to squeeze in little voltage boosting module to get the full output power regardless of the limited 2S battery voltage of the Quansheng batteries. I'm using modules like these: https://de.aliexpress.com/item/1005008208376182.html

This adds a little extra bulk but it's well worth it overall.

Update v3: I've found that some 3rd party batteries have contacts just different enough to not work with pogo pins. They are forced out of the way when inserting the battery and being damaged. v3 is my version with slightly tweaked pin position that work with these.