Opus BT bt c3100 v2.2 question

[dj_Adam21]

Hi i just got a bt c3100 and I also have an xtar vc4,there's something weird happening with the opus, it doesn't charge my samsung q30's to 4.2v @ 1000 MAh it charges them only to 4.18 .
The same batteries will go from 4.18 to 4.20 in my xtar vc4
Anyone has any clue?

 

[Baditude]

Is the Opus indicating that the battery is fully charged?

There may be some settings you can adjust on the Opus which will allow it to charge to 4.2 volts. Read your instruction manual fully.

 

[dj_Adam21]

Is the Opus indicating that the battery is fully charged?

There may be some settings you can adjust on the Opus which will allow it to charge to 4.2 volts. Read your instruction manual fully.

Yup it has a switch inside to change it from 3.7 to-4.2 to -4.35 it's on 4.2

 

[Baditude]

Your charger apparently is not "trickle charging", which is a good thing in my opinion. Many chargers are trickle chargers, which continue applying voltage to keep a fully charged battery (4.2 volts) at 4.2 volts. I'd rather grab my batteries charged to 4.1 volts rather than 4.2 volts.

Don't ask me why, as that will open up a can of worms.

 

[VapieDan]

Yup it has a switch inside to change it from 3.7 to-4.2 to -4.35 it's on 4.2

I took mine apart. I see no switch anywhere. Do you have a picture?

 

[VapieDan]

OK found it but don't like what it does. It will take a 18650 up to 4.35 volts unattended. I guess if you watch it and pull it off at 4.21 or a little higher it would be fine. I took it back to the lower setting. I can live with a very slightly lower charge.

 

[dj_Adam21]

Yeah same here I'm charging my batteries over night so don t really in the 4.35v option

 

[Baditude]

I can live with a very slightly lower charge. View attachment 587507

I would think so. You won't notice the slight under-charge while you vape.

Your particular charger may not be measuring full voltage accurately/precisely. I personally wouldn't be concerned about 0.02 volts.

 

[KenD]

OK found it but don't like what it does. It will take a 18650 up to 4.35 volts unattended. I guess if you watch it and pull it off at 4.21 or a little higher it would be fine. I took it back to the lower setting. I can live with a very slightly lower charge. View attachment 587507

That's for charging the few li-ion batteries that take a 4.35v instead of a 4.2v charge. Not to be used with regular batteries! My Opus undercharges a bit whereas my Xtar overcharges. It's far better to undercharge the batteries a bit.

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