VR408 opperate without batteries

how can i opperate my Allbot without batteries? VR408
on with board must i connect a extended power and witch voltage … DC ?

Use a 5VDC powersupply that’s also capable of delivering 3A

Also make sure to remove the batteries first.

Best Regards,
VEL337

must i use the input SK1 on the VRBS1 shield ?

yes
the VRBS1 will generate 12V for the Arduino.

What also possible is to connect the arduino with a USB cable and power the servo’s via the DC IN connector on the VRSSM