Ultrafire WF-138 Charger Features:

• Input  100-240V 50/60Hz 
• Output 1   3.6V-250mA;2x3.6V-250mA 
• Output 2   3.0V-250mA;2x3.0V-250mA 
• GrossWeight(g)  125  
  

Ultrafire WF-139 Charger Features:

• Input 1: 100-240V 50/60Hz
• Input 2: 12V-400ma
• Output: 4.2V-450mA
• NetWeight(g) 157
• Design for 14500, 17500, 17670, 18500, 18650

Ultrafire WF-137 Charger Features:

• Input : 100-240V 50/60Hz
• Output: 4.2V-900mA
• NetWeight(g) 126
• Design for 18650, 17670 Battery