My WF-139 charger keeps blinking forever

[richardcpf]

Just got a WF-139 charger (the black one) from DX. I modded it so it can charge CR123 in the horizontal slots.

The problem is that the light turns red, but blink to green once every 2 seconds. I've been waiting for 10 minutes and still blinking. Im not sure if it is really charging or not.

I measured the voltage in both charge bays and it was 4.03 and 4.12.

The same batteries in the white charger does charge correctly. Any clue?

Thanks-

 

[Ray1968]

I'm not sure 10 minutes equates to 'forever', but 123's take longer than 10 minutes to charge in my WF-139 (I'm using the spacers though).

 

[richardcpf]

I'm not sure 10 minutes equates to 'forever', but 123's take longer than 10 minutes to charge in my WF-139 (I'm using the spacers though).

Not forever, but I've read in this forum that when the red blinks to green every 2 seconds is because the charger is "detecting" the charge of the cell.

Or the WF139 blinks when it's charging?? unlike the static red of the TR001 white charger.

 

[Ray1968]

Yes, the WF-139 will blink while charging. Then go solid green.

 

[richardcpf]

Yes, the WF-139 will blink while charging. Then go solid green.

Oh my mistake...

Another question: the same cells gets a little bit warmer (not hot) in the WF139 than in the white charger. Is this normal?

 

[Black Rose]

Does the WF-139 have a higher charging capacity (mA output) than the white one?

 

[richardcpf]

WF139 Black charger: 0.35A
TR001 White charge: 0.22A

 

[Black Rose]

I found the WF-139 on DX. It shows 450 mA output.

The TR-001 shows 500 mA output.

Weird.

 

[richardcpf]

Maybe it's another (manufacturer rated) product... Measured many times with different batteries and only 0.2A variation. The black one says "rapid charger"...

Or probably my white one is a defective unit. Charges at 4.10V max, even if the light is green. When i put the same cell to the wf139 it still charges for about 10 minutes at 4.23V