(Battery must be >3V and installed before enabling this function)
Open - Short - Automatic shutdown disabled
|}
3. Connector for External Power Switch
{| class="wikitable collapsible collapsed"
! 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
|}
==Document==