So I recently got a Turnigy Accucell-6 hobby charger to complement my Ultrafire 139.
Here's the problem, I used the LiPo charge setting to charge a single Ultrafire 18650 2400mah cell. I checked the voltage at start and it was 4.10v. when the charger signaled it was finished I checked the voltage and it read 4.14v.
Huh. So I tried it again. Kicked off again, and was "reading" 4.20V as the finished voltage. I tried another 18650. Same thing, kicked off at 4.14V, verified by my voltmeter(s).
I then calibrated it, and during the calibrating setting it was right on in reading the cell voltage at 4.14V.
I tried charging both cells in 2S mode, kicked off at "8.4v" but each cell read 4.14V. Checked them with 2 different DVM, same thing.
I then tried to "trick" the charger by under-calibrating it and it charged to 4.15v.
So I put both cells in the Ultrafire W-139 charger and it topped them both off to 4.20V at the end of the charge read by both of my DVM.
Is it acceptable for the charger to go to 4.14V? Seems like I am not getting a full charge or is this where I would ideally like to charge to to maintain my cells in tip top shape?
I don't feel like shipping this back to Hong Kong and it seems to be working fine. Any thoughts?
Here's the problem, I used the LiPo charge setting to charge a single Ultrafire 18650 2400mah cell. I checked the voltage at start and it was 4.10v. when the charger signaled it was finished I checked the voltage and it read 4.14v.
Huh. So I tried it again. Kicked off again, and was "reading" 4.20V as the finished voltage. I tried another 18650. Same thing, kicked off at 4.14V, verified by my voltmeter(s).
I then calibrated it, and during the calibrating setting it was right on in reading the cell voltage at 4.14V.
I tried charging both cells in 2S mode, kicked off at "8.4v" but each cell read 4.14V. Checked them with 2 different DVM, same thing.
I then tried to "trick" the charger by under-calibrating it and it charged to 4.15v.
So I put both cells in the Ultrafire W-139 charger and it topped them both off to 4.20V at the end of the charge read by both of my DVM.
Is it acceptable for the charger to go to 4.14V? Seems like I am not getting a full charge or is this where I would ideally like to charge to to maintain my cells in tip top shape?
I don't feel like shipping this back to Hong Kong and it seems to be working fine. Any thoughts?