I use it to date which I need only for 18650 batteries for my flashlight.
The charging time is per battery around 4 to 4.5 hours.
The instrument switches reliably after charging (red light is on) to trickle charging (green lamp lit) around. During charging, the batteries are estimated to reach the human body temperature. The device itself reaches approximately the same temperature. I have not measured it, however.
Use the charger now since more than 1 week, and have thus a total of more than 10 charging processes completed (single shaft and double shaft load).
I believe that the thing is OK and without problems. Price also bearable.
The WF-139 of Ultrafire invites all current 3.6 and 3.7 Volt Li-Ion batteries of sizes 14500, 17500, 18500, 17670 and 18650th
Each well is loaded separately with 4.2V at 450mA, while the two loads are independently controlled, so that different types of batteries or rechargeable batteries with different charge level can be charged simultaneously without causing damage may occur. (Written statements of the manufacturer). A suitable connection cable with Euro plug is included with the delivery.
An equally original car cable is also available for the device, however, is not, unfortunately, in the normal delivery. Additional price the cable is 1/4 of the charger itself. That is far too much.
Two LEDs indicate the current state of charge (charging: red or trickle charging: green).
German manual is also missing - only English and Chinese 'is.
I've scanned the English instructions and translated via Google Translator into German.
Technical Specifications:
Manufacturer: UltraFire
EAN: 4250420102082
Type: WF-139 Rapid Charger
Input 1: 100-240 Volt 50 / 60Hz
Input 2: 12 Volt (car charger NOT included!)
Output: DC 4.2 V - 450mA
Dimensions: ca. 140x62x30mm
Weight (without power cord) Approx 100g
Color: Metallic Grey
Conclusion: Charger for a reasonable price.
Sorry, no possibility for a second, gentler charging stage (approximately 200mAh), but at least by the internal overload protection (switch back to trickle charge when the battery is full) some security .. There are indeed such chargers but at a far higher price. Is then questionable whether the also counted in the battery prices still falling '..
That's because you have no way to load the batteries 4 stars slower and gentler and due to the lack of vehicle power cable 'though the connection to the device exists and the cable should be included.
