DX  » Community » Reviews » UltraFire WF-139 3.7V 14500/17500/18500/17670/18650 Battery Charger (AC 100~220V/DC 12V)
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  • Overall Rating: 5
  • Price: 4
  • Quality: 4
  • Ease Of Use: 5
  • Usefulness: 5
best LiIon car charger on DX – UltraFire WF-139 3.7V 14500/17500/18500/17670/18650 Battery Charger (AC 100~220V/DC 12V) Reviews

posted by venuz on 05/04/2010 Certified Owner

Involvement:Expert (understands the inner workings) - Ownership:1 day to 1 week

Pros:
universal charger, gives you a possibility to charge wide range of LiIon cells and can be used in car or with AC mains. gives 5.3V on open circuit. - low charging current, gives me 360mA, so it is ok to use it with 10440; - no trickle charge; - cut-off at 4.18A both channels;
Cons:
- doesn't fit trustfire protected 18650 (neither blue nor black, they are up to 68mm max), need to disassemble and modify body to give more space for sliding contacts;
Other:
side contacts can be soldered easily to charge 16340 but it is better to leave them as is and use a spacer for these purposes - there is no polarity specified on charger's body for these contacts. also you can accidentally make a short circuit for 18650 with damaged envelope.
Bottomline:
imho the best LiIon car charger on DX.

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