1.0 FEATURE
1.1 It is very smart charger which can auto-switching output;
1.2 It can charge any 1~4cells Li-Ion battery pack or Li-Polymer battery pack which capacity is more than 500mAh;
1.3 The charger will cut off automatically if battery is fully charged;
1.4 MCU control the whole charge process and guarantee the battery pack get fully charge,avoid the battery pack over-charge;
1.5 Led display the charge status,red and green led flash for 2 times after supply AC power,then both off,red led on in charging,green
led on after fully charge,red led flash in error statu or short battery pack.
      
2.0 INPUT
2.1 Voltage 
Minimum   Normal    Maximum   Unit
10   15       20   Vrms
2.2 Current
4A(MAX)
2.3  Power efficiency
80% (min.) at full load.

3.0 OUTPUT
3.1  Charge curent
     2A
3.1.1  Auto-switching output voltage:
1. 4.2V+/-1.5%;
2. 8.4V+/-1.5%;
3. 12.6V+/-1.5%;
4. 16.8V+/-1.5%.
3.2  Led display
Green on ---  idle or fully charged
Orange on--- charging
Red led and green led flash for 2 times after power on,then both off

4.0 PROTECTION 
4.1 Over voltage protection
Output  over voltage protection with zener diode.
4.2 Short circuit protection
The output short to ground, it will auto-recovery after remove the error.
4.3 Reverse battery connection protection
  When output reverse battery connect,the unit will no
  Damage.  
    
5.0 ENVIRONMENT:
5.1 Ambient operation temperature
  0℃ to  +40℃
5.2 Ambient operation relative humidity
     20%  to  85%
5.3 Ambient storage temperature
 -40℃ to +70℃
5.4 Ambient storage relative humidity
     10%  to  95%

6.0 DROP TEST      
6.1 Freely drop the wooden board from the height of 75cm for two times per side(front/back/left/right).
 
7.0 VIBRATION TEST      
7.1 Vibration frequency:5-60-5Hz with 10 octave/min@2.1G
7.2 Three circles per axis(X,Y,Z) for 10minutes

8.0 MTBF
40,000 hours base on  bellcore  TR332 document  required  at 25℃.
           
9.0 Outline
9.1.Outline dimension: 99.5L X 57W X 33(H) mm MAX;;
9.2.Profile:surface smooth ,no scar and mechanical damage.