UltraFire WF-139 3.6/3.7V Battery Charger

• 100V/220V auto AC switch
• Charges these 3.6/3.7V lithium batteries: 18650, 14500, 18500, 17670, 17500 rechargeable batteries
• Charge single or two batteries at a time
• Two separate charging channels - batteries can be mix-charged
• Auto-off when batteries are fully charged
• UltraFire Model: WF-139
• Length: 5.31"(13.5 cm), height: 2.36"(6.0 cm), width: 1.18"(3.0 cm), weight: 7.58 oz(215 gram)
• Output: 4.2V @ 450mA
• Charging time
  - 2 to 4 hours for 18650 batteries
  

Note:

• It was reported that the positive nodes of the charger is overly recessed into the top of the unit causing problems charging some 18650 batteries and a workaround for this is to bend a paperclip and use it as a filler between the node and your battery. In the meantime, the Ultrafire 18650 batteries charge fine with this charger as is.