21V 3A 5S Lithium Battery Charger -  for 18V Li-ion/LiPo battery pack;  UK, EU plug

Charging voltage: 21V CC/CV

         green light -  when fully charged or not connected.

         red light - charging

Protections:

constant voltage, constant current, over-voltage, over current protection function; indicator light conversion; automatic recovery.

Connectors:  default is DC 5.5x2.1 mm  

                  other connectors are available as well. 

Output current -  3A, constant current charging, the indicator light is red
Conversion current, 300mA, after full conversion, the indicator light is green
Efficiency, >80% (maximum output voltage, full load)
Input voltage range, 220~ 240VAC; 47 ~ 63Hz; 
Input current, 0.03A/230V
Overload protection, 105%~150%, Type: FOLDBACK current limit output Reset: automatic recovery
Temperature coefficient, ±0.03% °C (0 ~ 50 °C) OUTPUT
Working temperature, humidity, -10 ° C ~ +50 ° C, 20% ~ 90% RH
Storage temperature, temperature, -10 ° C ~ +60 ° C, 20% ~ 90% RH
Dimensions, 115 × 48 × 28mm
Weight, 160G