User Instructions
Black Dragonfly Agriculture Drone Instruction Book 
11 
9)    Charger Maintenance and Cautions 
(1) Parts Name 
(2) Operation Instruction 
1.Start and self inspect 
Check all the wiring connections-confirm all is right-turn on main switch on charger-LCD screen 和
LED  indicators will on  light-At the  same time, the  buzzer  is  turned on.  When  the  buzzer ends, the  charger 
completes normal startup and self inspection. 
2.Work mode instruction 
Charging mode:In this mode, the battery can be charged in a fast and balanced way; 
Maintenance mode:when the battery is not used for a long time, it is recommended to maintain   
The battery once every 15 days;In normal use, if the battery life is significantly reduced or the cell difference 
exceeds 50mV,it is recommended to carry out maintenance operations;In the maintenance mode, the charger will 
use a small current to charge , discharge and balance the battery , so as to adjust the voltage of each battery unit to 
between 3.84-3.86V. 
Continuous working mode:when the charging steward is connected, the host will automatically recognize and 
switch to continuous working mode.   
3.Work current setting   
According  to  the  battery  capacity  and  actual  use  requirements,  flip  the  current  selector  switch  to  the 
corresponding gear to complete the current setting 
4.In charging 
Long  press  the  charging  button  for  more  than  2  seconds,then  enter  into  the  charging  mode  or  start 










