How to force Synology NAS VPN client unlimited auto connect

Reconnect scripts location:

/usr/syno/etc.defaults/synovpnclient/scripts/ip-down
/usr/syno/etc/synovpnclient/scripts/synovpnclient.sh

Edit NAS /etc/crontab

0,5,10,15,20,25,30,35,40,45,50,55 * * * *  root  /bin/bash /usr/syno/etc/synovpnclient/scripts/synovpnclient.sh start

Reference: Manfred, VPN client auto reconnect not reliable, Jan 14, 2021, https://community.synology.com/enu/forum/1/post/138326

Protection circuit

under voltage

over voltage

reverse voltage

over current

eFuse

TPS2596

https://www.ti.com/lit/ds/symlink/tps2596.pdf?ts=1618877875762&ref_url=https%253A%252F%252Fwww.google.com.hk%252F

TPS2663x

https://www.ti.com/lit/ds/symlink/tps2663.pdf?ts=1618907192809&ref_url=https%253A%252F%252Fwww.ti.com%252Fpower-management%252Fpower-switches%252Fefuse-hotswap-controllers%252Foverview.html