Does what it should, but only after conversion!

Does what it should, but only after conversion!

UltraFire WF-139 Charger 18650 + optional RCR123 3.7V Li-Ion (Electronics)

Customer Review

I have a Fenix ​​TK35, four EagleTac ordered me 2.4 Ah batteries and 18650'er these loaders. A Voltcraft Multimeter equal to.
The four batteries had an open circuit voltage of 3.81 COD - 3.82 volts. Perfect! Enstpricht about 40% charge.
Then I grabbed two batteries in the charger and put the power cord into the outlet. The LED lit green immediately and after 10 minutes still green.
Nanu? Green is still hot, the batteries are full and red is hot, the batteries are charged. As the batteries have not 4.1 volts, but only 3.8 volts, would have to be actually loaded.
So I looked again in the reviews and the knife forum made sure me again that red means charging and 3.8V EMPTY means.

By chance I took the battery time at the power plug inserted and because the LED lit up red briefly.
On closer inspection of the equipment I saw that the nipple at the positive pole are too far up. So when you press the battery up to the positive pole all the way down in the charging cradle, the EagleTac have no more contact with the Polnippel and the device can not load.

Modding:
I then glued the top two rubber pads of Tesa, which prevent the battery can be pushed up to the bottom of the charger and so contact with the positive terminal loses again.
Well the battery depends somewhat in the air, but he invites perfect.

Charging:
The red LEDs are lit, the batteries are more than 30 ° C warm, the device above 40 ° C.
After about four hours with 3.8V empty batteries are charged to exactly 4.1 volts, and the LEDs are green.
Single shaft charging works because the LEDs jumping at different times to green.

Tip:
After the LEDs are turned green, remove the batteries. They are exactly 4.1 volts to 100% and are not driven by the trickle charging continues until the onset of the integrated circuit of the battery at about 4.2 volts. This should lt. Knife Forum be a problem with the charger.

Conclusion:
The charger is doing what he should. It is a maximum of 40 ° C warm in the 23 ° C hot kitchen and he has single channel charge. The batteries are a maximum of 30 ° C warm.
My EagleTac batteries have a very flat positive terminal and the charger has the nipple on the positive too far up. If you moddet the charger with about 2 mm high pads, then everything works fine. That is why also the fifth star is gone.

The temperature measurement I made with a Scythe IR thermometer.
The voltage measurements with Voltcraft VC130.

In operation too loud !! Rank: 3/5
January 2
Great toy 9 Rank: 5/5
December 27
bowie is Rank: 5/5
May 12
A wonder! 22 Rank: 5/5
September 21

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