I've run both the mobile and desktop version on my phone and it just drains the battery way too fast. I ended up just using an rsync cron job to sync my phone over ssh while everything else uses syncthing (and yes, I know this means I can't delete anything but I very rarely do anyway.)
You can set it to sync only on wifi and/or only when charging, which has always done the job for me. Depends on your use case, but things like password DBs need to be update-able from both directions, which rsync doesn't really do. On the other hand, I can rely on the fact that I don't need my home to be sync'd up unless I'm actually at home, on wifi.
