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4. If the jumper inserted before battery, remove battery & jumper then repeat step 1, 2 and 3.
* Open - Automatic shutdown disabled
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# How to connector external power switch
{| class="wikitable"
! Pin No. !! Pin Description
|-
! 1
| Power on/off control connecting to switch
|-
! 2
| Ground
|-
! 3
| LED+ for battery low indicator
|-
! 4
| LED+ for power on, rebooting and shutdown
|}