Official IO6 Atomizer beta thread...

[Greeny]

Don't go into panic mode yet. My batts come off my W-138 at 3.37V, yet both bays unloaded read 5.24V at both settings 3.0 and 3.7V. It is kind of normal to have them come off a little higher and settle to 3.3V after a few minutes. I have been using my charger for over a year with one set and just acquired another set about 4 months ago. No problemo. Keep an eye on them when they are charging to see if the batts get unusually hot. When the green light comes on take them out and let them settle for 2 minutes or so then take your reading. 3V batteries can charge up to 3.6V whilst 3.7 charge yp to 4.2V.

I have often forgotten my batteries overnight on the charger and all was fine. When the green light comes on the charger shuts off and just trickles.

Ok, so 5.24v (unloaded) in each bay is 'normal' on the WF-138A?

None of my LiFeP04's have gotten hot, in fact, not even warm.
Maybe just 'slightly' warmer than room temperature is all.

And this WF-138A does have "auto shut-off" after the LED's
turn green then? I had started wondering if maybe it didn't.

Because I had understood that it did, so I left two of my LiFeP04's in there for at least half the day before using them last night. And the 2nd set were also left in there after the LED's turned green while I was still vaping on the 1st set. Yet the 1st pair came off around 3.8v, and the 2nd pair were actually higher: 3.98v and 4.00v. This was an immediate reading, and they began to drop a little as I watched on my DMM. Surprisingly they were not hot at all, so I started vaping with them to discharge them further.

Now I'm curious. You mentioned leaving them in over-night and that all was fine. Even with auto shut-off, did yours measure high after that? Or were they still at or under 3.6v?

After using each set of my LiFeP04's last night, I measured them again today and all four of them were at 3.32v, and this was after using each set for over 2 hrs last night with the i06.

So after reading your note, I decided to stick a pair back in my WF-138A charger. In less than a half hour the LED's turned green. I measured each one and both came off at 3.60v, and after 10 minutes both were at 3.47v. Much closer to normal, the difference being that this time I took them out of the charger right after the LED's turned green instead of leaving them in till I was ready to use them. I did the same with the 2nd set, and got the same results: both at 3.60v hot off the charger, and both at 3.45v after several minutes. Fairly reasonable so far, considering the higher readings I was getting yesterday.

So I'm vaping on my i06 again tonight to see how these batteries go. I just measured my LiFeP04's again after I felt VP dropping a bit. They're each at 3.31v right now. I normally don't vape below nominal voltage, but this time I'm gonna let my LiFeP04's drain below 3.2v nominal (to 2.8v or even 2.5v) to give them a "full cycle".

So, I'm thinking maybe this auto shut-off thingee in the WF-138A may be one of those that don't truly trickle charge to 'maintain' a full charge (ie: a pulse modulation that kicks in when the battery voltage drops, and then pulse-charges the battery back to a full charge again, and then shuts off till the battery voltage drops again, etc.).

Rather, maybe it just charges much slower at the end of a charge so that it continues to charge (simulating a trickle charge like some chargers do), charging slow enough to give a user more time to remove them from the charger, but can still overcharge the batteries if I leave them in too long? Or maybe mine isn't shuting off after the LED's turn green?

I'd have to experiment some more (or research) to know for sure, but I don't want to mess with my new LiFeP04's and put them at risk. Which is why I was wondering if you happened to meter your LiFeP04's after leaving them in your WF-138a overnight, because if your batteries were up to 3.6v or less after leaving them in overnight, then perhaps I may have a faulty charger after all...or the auto shut-off in my WF-138a might not be working properly.

Thanks for your info Switch, it helped me do some
preliminary troubleshooting here, and get me back
on my i06.

Whew! I missed my i06, 'cause it really brings
out the flavor in my Apple Pie juice! yummy!

 

[Greeny]

That doesn't sound right, G. I think you need to contact the seller of the charger asap and get it replaced. Also, be careful, your LiFePO4 batts may be permanently damaged. I don't like messing around with batts especially when stacking them...

I contacted the seller in the early evening (5:30pm) and listed the readings I've been getting from my LiFeP04's off the WF-138A charger. I had also asked if the WF-138A was known to read 5.24v in each battery bay on both 3.0/3.6v charge settings. I'm waiting a reply to see what he says.

 

[mwa102464]

Day 29 i06 still going like the Energizer Bunny !

 

[mwa102464]

Ok, so 5.24v (unloaded) in each bay is 'normal' on the WF-138A?

None of my LiFeP04's have gotten hot, in fact, not even warm.
Maybe just 'slightly' warmer than room temperature is all.

And this WF-138A does have "auto shut-off" after the LED's
turn green then? I had started wondering if maybe it didn't.

Because I had understood that it did, so I left two of my LiFeP04's in there for at least half the day before using them last night. And the 2nd set were also left in there after the LED's turned green while I was still vaping on the 1st set. Yet the 1st pair came off around 3.8v, and the 2nd pair were actually higher: 3.98v and 4.00v. This was an immediate reading, and they began to drop a little as I watched on my DMM. Surprisingly they were not hot at all, so I started vaping with them to discharge them further.

Now I'm curious. You mentioned leaving them in over-night and that all was fine. Even with auto shut-off, did yours measure high after that? Or were they still at or under 3.6v?

After using each set of my LiFeP04's last night, I measured them again today and all four of them were at 3.32v, and this was after using each set for over 2 hrs last night with the i06.

So after reading your note, I decided to stick a pair back in my WF-138A charger. In less than a half hour the LED's turned green. I measured each one and both came off at 3.60v, and after 10 minutes both were at 3.47v. Much closer to normal, the difference being that this time I took them out of the charger right after the LED's turned green instead of leaving them in till I was ready to use them. I did the same with the 2nd set, and got the same results: both at 3.60v hot off the charger, and both at 3.45v after several minutes. Fairly reasonable so far, considering the higher readings I was getting yesterday.

So I'm vaping on my i06 again tonight to see how these batteries go. I just measured my LiFeP04's again after I felt VP dropping a bit. They're each at 3.31v right now. I normally don't vape below nominal voltage, but this time I'm gonna let my LiFeP04's drain below 3.2v nominal (to 2.8v or even 2.5v) to give them a "full cycle".

So, I'm thinking maybe this auto shut-off thingee in the WF-138A may be one of those that don't truly trickle charge to 'maintain' a full charge (ie: a pulse modulation that kicks in when the battery voltage drops, and then pulse-charges the battery back to a full charge again, and then shuts off till the battery voltage drops again, etc.).

Rather, maybe it just charges much slower at the end of a charge so that it continues to charge (simulating a trickle charge like some chargers do), charging slow enough to give a user more time to remove them from the charger, but can still overcharge the batteries if I leave them in too long? Or maybe mine isn't shuting off after the LED's turn green?

I'd have to experiment some more (or research) to know for sure, but I don't want to mess with my new LiFeP04's and put them at risk. Which is why I was wondering if you happened to meter your LiFeP04's after leaving them in your WF-138a overnight, because if your batteries were up to 3.6v or less after leaving them in overnight, then perhaps I may have a faulty charger after all...or the auto shut-off in my WF-138a might not be working properly.

Thanks for your info Switch, it helped me do some
preliminary troubleshooting here, and get me back
on my i06.

Whew! I missed my i06, 'cause it really brings
out the flavor in my Apple Pie juice! yummy!

Greeny,

I've left Batts in chargers many a times but for safety reason it is best to take them out once you get the green light, even best to let your batts sit for a good while before using them, same goes when taking them out of your mod let them sit before you just slam them right in the charger, and even better to turn your charger off when not in use ! just safe protocol to do ! There have been known incidents of fires starting by leaving chargers unintended in the past.

 

[loft]

Day 29 i06 still going like the Energizer Bunny !

I forget how long I've been using mine but I've been using the same initial HV one I was sent for about 3-4 hours a day without problem. Still going strong. Still hasn't been cleaned/modified/etc etc. Longest lasting atty I have ever used.

 

[mwa102464]

I forget how long I've been using mine but I've been using the same initial HV one I was sent for about 3-4 hours a day without problem. Still going strong. Still hasn't been cleaned/modified/etc etc. Longest lasting atty I have ever used.

Hey loft,

I cant say the longest Atty as of yet for me, as I've had ones that have lasted for 5-6 months before ( Ikens of course ) but I will say I'm thinking these i06's may be the leaders to longevity as I'm keeping track on these bad boyz and as far as vapor production they too are right up top ! I also like the newer 510's that Issac just put out too, they feel lighter to me in weight and are producing results also, and there purty too with there Chrome finish , I'm giving them both a 's up

 

[Greeny]

I agree with what you are saying but his LiFePO4 batts are charging up to 3.84V. That's not good just like if a 3.7V battery charging up to 4.4V wouldn't be good for the battery longevity and possibly safety. It really seems that his charger is overcharging his batts imo.

I hear you my good man, but what is he reading a few minutes after taking them off?

I don't know, he didn't say. He said that "After vaping for about 2.5 hrs, I measured them again and they were 3.35v and 3.34v..." which is close to what they should be metering after they settled before he even started vaping.

I'm not sure, you obviously know more about batteries than I do and I respect your opinion. I just always thought that they should not be charging up past 3.6V which would indicate over-charging.

These were fairly immediate readings. I saw the 3.84v reading dropping in voltage after I kept my DMM probes on the battery till it matched 3.75v on the other one. Both read 3.75v after that, but doing this only took about a minute or so. Then I wiped down my PV and in they went after a couple minutes.

And indeed after about 2.5 hrs of vaping, these two batteries metered at 3.35v and 3.34v, and after some more vaping 3.21v and 3.20v. These readings were taken while my i06 was still warm. Then I took a 2nd set of batteries out of the 138A charger to swap them with these.

The 2nd set were metered immediately as I wanted to keep vaping. The 2nd set metered at 3.98v and 4.00v (though for a split sec the higher one was 4.01v). I kept my DMM probes on this battery to make it drop faster, to 3.8v. Then the other to 3.8v. This took about 2 minutes. Then in my PV they went.

Later the next day, after reading Switcher's recent note, I decided to try charging them again...but this time removing the batteries from the charger right after the LED's turned green (instead of leaving them in the charger till I was ready to use them). And it made a difference. Both sets of batteries came off at 3.60v right after the LED's turned green.

What was strange however, is that all four batteries read exactly the same before attempting to recharge them again: 3.32v. And I say strange because one of the pairs were 3.21v and 3.20v after vaping the evening before. But they were reading 3.32v the next day.

The lower 3.21v and 3.20v readings were taken immediately after vaping yesterday while the i06 was still warm. So I imagine the higher 3.32v reading is a result of some "recovery" that was already occurring after vaping. Or was this due to the fact they had just been overcharged a day before and LiFeP04's tend to exhibit some sort of "elasticity" during recovery after being over-charged?

LiFeP04's are a new chemistry for me. For years I've used and been familar with NiCads, NiMH's, LiCo's, Li-Polymers, Lead Acid, and some large Sealed Lead Acid (AGM) back-up batteries. The new IMR LiMn's I started using seem to behave much like LiCo's, pretty straight forward. Some rechargeables are more forgiving than others, while some less.

But LiFeP04's are kinda surprising. Even when they're within normal voltages it seems, for they seem to exhibit some sort of elasticity. Or is this a typical characteristic only when they're initially over-charged? I've already read two conflicting sources online after a little bit of research: one source says LiFeP04's tolerate abuse well, such as overcharging and higher than normal voltages; while another source says they don't tolerate overcharging as well as other rechargeables. I'm gonna keep researching.

Sorry for the off-topic here, but it is related to pressing my i06 back into service.

 

[emonty]

I thought that the LiFeP04's had to be charged with a special charger only used for these batties.....

 

[jonny2hottie]

I also like the newer 510's that Issac just put out too, they feel lighter to me in weight and are producing results also, and there purty too with there Chrome finish , I'm giving them both a 's up

i got 2 of the XLR 1.5ohm 510's ...man they match my chrome provari perfectly! yet i still use a silver chrome empire drip shield...they perform very well. i like them better than any other 510 atomizer out there! got a youtube short review of them im posting up as we speak..may take a little bit.. loading HD video's takes longer...check my youtube channel. Subscribe if you can. Thanks!

 

[Greeny]

Greeny,

I've left Batts in chargers many a times but for safety reason it is best to take them out once you get the green light, even best to let your batts sit for a good while before using them, same goes when taking them out of your mod let them sit before you just slam them right in the charger, and even better to turn your charger off when not in use ! just safe protocol to do ! There have been known incidents of fires starting by leaving chargers unintended in the past.

Gotcha! Thanks!

That Pila charger I also bought has got me spoiled already!
And before that, so had my LaCross computerized charger.

Now Ikenvape atties has gotten me spoiled too!
They're so dang easy to use. And your're right about
Ike's new 510's...I got them in each ohm range to try.
They're so stealthy and smoooooooooth, like a Puma!

Ike's i06, or his 510? The i06, or his 510?
Dang, it's easier just to sell my sister's right arm to keep them both!

 

[Switched]

Gotcha! Thanks!

That Pila charger I also bought has got me spoiled already!
And before that, so had my LaCross computerized charger.

Now Ikenvape atties has gotten me spoiled too!
They're so dang easy to use. And your're right about
Ike's new 510's...I got them in each ohm range to try.
They're so stealthy and smoooooooooth, like a Puma!

Ike's i06, or his 510? The i06, or his 510?
Dang, it's easier just to sell my sister's right arm to keep them both!

Do you have a 3.0V on your Pila charger? If so give them a whirl on that one.

Although I have pulled my batteries off at 3.7V within minutes they read 3.36-3.37. I did the test last night after my posts, especially after the post from Vapo... just to make sure. I never used Li IOns so I don't know about those but apparently they come off at 3.6V ???

I am no battery expert just reported my findings since we have the same charger, I got mine from Isaac last year and all is well. Yes chargers will originally give a boost charge (wake up, (IF the batt is not below its LV threshold, protected batts will not allow them to be charge if below the thershhold, not so with IMRs) and then diminish its charging current as the battery charges.

Undoubtedly low and slow is best for charging a battery, but who wants to wait that long e.g the nano charger that takes 6-8 hrs to re-charge a 16340?

I have 2 chargers both acquired from Isaac. The other one is a SE-H001 the specs on that:

• Output: 2 x 4.2V - 300mAh
• 60mA at 15 hrs (standard charge)
• 300mA at 2.4 hrs (quick charge)

I can't change the setting on the charger but it does take 6hrs + to charge RCR 123As (750mAh batts on it) while at the 3.6V setting on the W-138 a couple to 3hrs.

The best place to learn all this is at : Basic to Advanced Battery Information from Battery University

I hope this helps, this is my experience using this charger. As Mr Mustachio, I don't F around with safety where batteries are concerned. I do not promote leaving batteries to charge unattended, but I am absent minded and it does occur occasionally. Normally I will wait for an opportune time to charge (when I am at my desk vice chrging late at night.

 

[emonty]

for the lazy and absent minded one's: put your batties on the charger before going to bed and put a time-clock on it with the amount that is needed........

 

[Bogey]

After a day with the io6 I got the soapy taste. I was really liking these but I don't think they will be for me if this taste can't be gotten rid of.

 

[dmazyn]

I just got a LR 1.8 and HV 3.5 and I have noticed that the HV running at 5V on my reo does not bring out the flavor as much as the LR 1.8 at 3.7. I am going to charge up my 3V batts and try the HV at 6V tonight to see if there is a increase in flavor.

I'm liking both so far the flavor reminds me of the 801's I used in the past on the reo.

 

[Switched]

2.5 = 5v, 3.5 = 6v

 

[Vaporologist]

............

And this WF-138A does have "auto shut-off" after the LED's
turn green then? I had started wondering if maybe it didn't.

........................

Now I'm curious. You mentioned leaving them in over-night and that all was fine. Even with auto shut-off, did yours measure high after that? Or were they still at or under 3.6v?

...................

So after reading your note, I decided to stick a pair back in my WF-138A charger. In less than a half hour the LED's turned green. I measured each one and both came off at 3.60v, and after 10 minutes both were at 3.47v. Much closer to normal, the difference being that this time I took them out of the charger right after the LED's turned green instead of leaving them in till I was ready to use them. I did the same with the 2nd set, and got the same results: both at 3.60v hot off the charger, and both at 3.45v after several minutes. Fairly reasonable so far, considering the higher readings I was getting yesterday.
............

I apologize for derailing this thread further but I feel this is important to mention...

Just like your 3.7V battery chargers should never charge your 3.7V batteries past 4.2V, your WF-138 charger should never charge your LiFePO4 batts over 3.6V regardless of how long you leave them on the charger after the light turns green. But as stated by others, you really should remove them as soon as the light turns green...

I strongly believe that your "auto shut off" is not working properly. The following is something I tested on both of my WF-138 chargers many times and have gotten consistent results in the past year and a half... Even though LiFePO4s charge up to and meter at 3.6V as soon as the light turns green, the voltage starts dropping toward about 3.36 (3.37)V where it finally settles REGARDLESS of whether batteries stay on the charger or are immediately removed. The only time I get a 3.6V reading is if I literally take them off the charger immediately as the light turns green (within 10 seconds or so..). But if these batts stay on the charger for about 15-20 minutes after, they always meter at about 3.36(7)V as soon as removed. So, the fact that yours meter at 3.6V when the light turns green but continue to charge to over 4V if you don't remove them, just does not sound right.

Also, as previously stated, don't use these batts as soon as they are charged. Let them at least drop down to 3.37V on their own. When using them, I let mine get down to 3.1V before replacing them. But it is a good idea to let them get back to their resting voltage as much as possible before recharging them. If you have at least 3-4 sets, that should not be a problem. Also, always keep them in pairs and make sure to rotate them every time, top to bottom. I have mine marked A1 A2, B1 B2... So one time 1 will be on bottom and 2 on top while the next time 2 will be on the bottom and 1 on top. You will notice that the top battery always drains a little more or a little faster and whichever one was on the top will always take a few minutes longer to charge.

Hope this helps and let us know what you discover with your charger. Hopefully, what you are experiencing is not a big deal but I just want to make sure that it doesn't become one.

 

[Greeny]

Do you have a 3.0V on your Pila charger? If so give them a whirl on that one.

Although I have pulled my batteries off at 3.7V within minutes they read 3.36-3.37. I did the test last night after my posts, especially after the post from Vapo... just to make sure. I never used Li IOns so I don't know about those but apparently they come off at 3.6V ???

I am no battery expert just reported my findings since we have the same charger, I got mine from Isaac last year and all is well. Yes chargers will originally give a boost charge (wake up, (IF the batt is not below its LV threshold, protected batts will not allow them to be charge if below the thershhold, not so with IMRs) and then diminish its charging current as the battery charges.

Undoubtedly low and slow is best for charging a battery, but who wants to wait that long e.g the nano charger that takes 6-8 hrs to re-charge a 16340?

I have 2 chargers both acquired from Isaac. The other one is a SE-H001 the specs on that:

• Output: 2 x 4.2V - 300mAh
• 60mA at 15 hrs (standard charge)
• 300mA at 2.4 hrs (quick charge)

I can't change the setting on the charger but it does take 6hrs + to charge RCR 123As (750mAh batts on it) while at the 3.6V setting on the W-138 a couple to 3hrs.

The best place to learn all this is at : Basic to Advanced Battery Information from Battery University

I hope this helps, this is my experience using this charger. As Mr Mustachio, I don't F around with safety where batteries are concerned. I do not promote leaving batteries to charge unattended, but I am absent minded and it does occur occasionally. Normally I will wait for an opportune time to charge (when I am at my desk vice chrging late at night.

Yes, indeed this is helping.

My Pila only charges 3.7v Li-ion batteries: to 4.12v, or to 4.2v with a reset button.
The Pila shuts off automatically after charging, and the batteries read the same even
if left in the charger for extended periods. I wish it charged 3.0/3.2v batts as well.

If your LiFeP04's still come off the 138A charger at 3.6v, or 3.7v when left overnight,
and settling to 3.35-3.37v after a few minutes either way...then it means there's
something different about my 138A charger, even though both our chargers read
5.24v (unloaded) in each battery bay on either 3.0/3.6v settings.

So far it seems the difference here is that my LiFeP04's are being over-charged when
left longer in the charger, while your LiFeP04's don't get over-charged even when left
in the charger over-night.

When my LED's turned green, I also got a reading of 3.6v off my LiFeP04's, and even
higher (up to 3.8-4.0v) after they were left in the charger for longer. Apparently then,
it seems that my charger's auto shut-off might not be working properly.

One more question, and to Vapo as well:

What voltage are your LiFeP04's rated? Are your LiFeP04's 3.2v or 3.0v?

My 16340 LiFeP04's are rated at 3.2v as printed on each battery: "AW LiFeP04 500mAh 3.2v"

I've pretty much ruled out the problem being with my LiFeP04's, since:

A) My LiFeP04's measured at or very darn close to nominal voltage when
they arrived last week, just as my 3.7v LiMn's and 4.8/5v NiMH's did too.

B) All four of my LiFeP04's also came off the charger at 3.6v right after
the LED's turned green on the charger. They only measured higher when
they were left in the charger for longer.

If our LiFeP04's are rated at the same voltage (3.2v), then
the problem is likely with my charger's auto shut-off switch.

PS: My supplier replied and said I definitely have a bad charger.
He said he'll meter out another 138A charger to make sure before
he sends it out to me. However, he may just get 5.24v from each
battery bay as well, if this is normal. So I'm asking him to take
readings off of some freshly charged LiFeP04's as well: 1) after
the charging LED's on the 138A turn green, and 2) after leaving
the batteries in the 138A charger for an extended period of time.

 

[Greeny]

I apologize for derailing this thread further but I feel this is important to mention...

Just like your 3.7V battery chargers should never charge your 3.7V batteries past 4.2V, your WF-138 charger should never charge your LiFePO4 batts over 3.6V regardless of how long you leave them on the charger after the light turns green. But as stated by others, you really should remove them as soon as the light turns green...

I strongly believe that your "auto shut off" is not working properly. The following is something I tested on both of my WF-138 chargers many times and have gotten consistent results in the past year and a half... Even though LiFePO4s charge up to and meter at 3.6V as soon as the light turns green, the voltage starts dropping toward about 3.36 (3.37)V where it finally settles REGARDLESS of whether batteries stay on the charger or are immediately removed. The only time I get a 3.6V reading is if I literally take them off the charger immediately as the light turns green (within 10 seconds or so..). But if these batts stay on the charger for about 15-20 minutes after, they always meter at about 3.36(7)V as soon as removed. So, the fact that yours meter at 3.6V when the light turns green but continue to charge to over 4V if you don't remove them, just does not sound right.

Also, as previously stated, don't use these batts as soon as they are charged. Let them at least drop down to 3.37V on their own. When using them, I let mine get down to 3.1V before replacing them. But it is a good idea to let them get back to their resting voltage as much as possible before recharging them. If you have at least 3-4 sets, that should not be a problem. Also, always keep them in pairs and make sure to rotate them every time, top to bottom. I have mine marked A1 A2, B1 B2... So one time 1 will be on bottom and 2 on top while the next time 2 will be on the bottom and 1 on top. You will notice that the top battery always drains a little more or a little faster and whichever one was on the top will always take a few minutes longer to charge.

Hope this helps and let us know what you discover with your charger. Hopefully, what you are experiencing is not a big deal but I just want to make sure that it doesn't become one.

Yep, I just read your reply immediately after posting. I am thinking the same thing here, that the auto shut-off switch in my 138A charger is what's likely faulty here.

My Pila charger has auto shut-off and works as you describe, without over-charging my batteries (my 3.7v batteries) even after being left in the charger. However, after a charge, I'm not gonna be leaving my batteries in this charger either.

This has really been helpful!

Thanks Vapo, Mustachio, 6v Mustache Man, Borat the Vaporologist.

And thanks Mr Switch dude! I really like your new avatar,
almost didn't recognize you with dem new sunglasses!

 

[5cardstud]

I apologize for derailing this thread further but I feel this is important to mention...

Just like your 3.7V battery chargers should never charge your 3.7V batteries past 4.2V, your WF-138 charger should never charge your LiFePO4 batts over 3.6V regardless of how long you leave them on the charger after the light turns green. But as stated by others, you really should remove them as soon as the light turns green...

I strongly believe that your "auto shut off" is not working properly. The following is something I tested on both of my WF-138 chargers many times and have gotten consistent results in the past year and a half... Even though LiFePO4s charge up to and meter at 3.6V as soon as the light turns green, the voltage starts dropping toward about 3.36 (3.37)V where it finally settles REGARDLESS of whether batteries stay on the charger or are immediately removed. The only time I get a 3.6V reading is if I literally take them off the charger immediately as the light turns green (within 10 seconds or so..). But if these batts stay on the charger for about 15-20 minutes after, they always meter at about 3.36(7)V as soon as removed. So, the fact that yours meter at 3.6V when the light turns green but continue to charge to over 4V if you don't remove them, just does not sound right.

Also, as previously stated, don't use these batts as soon as they are charged. Let them at least drop down to 3.37V on their own. When using them, I let mine get down to 3.1V before replacing them. But it is a good idea to let them get back to their resting voltage as much as possible before recharging them. If you have at least 3-4 sets, that should not be a problem. Also, always keep them in pairs and make sure to rotate them every time, top to bottom. I have mine marked A1 A2, B1 B2... So one time 1 will be on bottom and 2 on top while the next time 2 will be on the bottom and 1 on top. You will notice that the top battery always drains a little more or a little faster and whichever one was on the top will always take a few minutes longer to charge.

Hope this helps and let us know what you discover with your charger. Hopefully, what you are experiencing is not a big deal but I just want to make sure that it doesn't become one.

I agree. I leave mine on for 24hr. some time but I'm using a smart charger and it quits charging at 4.2 volts.

 

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Glad to be of help and Vlad you did well Just wanted to troubleshoot the problem and since the vendor want's to send him a new one, hey go for it.