one of my sabers(all v3.9 boards) seems to drain the battery when idle/sleep in about 2 weeks, my other 2 seem to last at least 2 months(can’t remember when last charged), i believe they are all weird the same main blade and a crystal chamber and a resistor on data 2 lines, have verified the CC does sleep after 15 mins
I had a similar issue a few years ago and it ended up being a short on the Shtok PCB I installed. I suspect it was something that got in after the fact since it was fine for ages.