About DC size  : we will send you 5.5*2.1mm 

 Technical data

Max. Output power:50W

Input voltage: 100-240V AC

Max. output voltage: 12V

Max. output current: 1.5A

Line frequency: 50-60Hz

Efficiency(at 100% load): >=85%

Ripple: <=1%*Vo

Temperature range: 0-45'C

Relative humidity: <65%

Protection

Over voltage protection

Over current protection

General specification

3-step charging control (pre-charge-CC-CV)

Option: a) NTC inside

             b) 100% cut off when battery fully charged

Dual color LED indicator: (Charging:Red; Fully charged or no load:Green)

Light weight and compact

High efficiency and low power consumption

Environmental specification

Operating temperature: 0C ~ 45C

Storage temperature:-20C ~ 70C

Humidity < 65%