help please, continued battery issues

[element9633]

I wrote a thread the other day explaining a problem with my vtc4s. I used them for about a month, then started noticing they were not holding charge. after about 15 minutes of use they would be back to 1/3 life (as shown by the light indicators on my nitecore i4 charger). I bought a couple efest batteries as replacements the other day, and they were working great. now only a few days later, I am noticing the same thing happening to them that happened to my sonys. what could be causing this?!? I have been leaving them on the charger overnight, could this do something?? I also noticed when I first bought the efests the charge time was pretty long, now im seeing they charge faster... im just looking for someone with advanced battery knowledge to help me figure this out

 

[VA Vince]

I wrote a thread the other day explaining a problem with my vtc4s. I used them for about a month, then started noticing they were not holding charge. after about 15 minutes of use they would be back to 1/3 life (as shown by the light indicators on my nitecore i4 charger). I bought a couple efest batteries as replacements the other day, and they were working great. now only a few days later, I am noticing the same thing happening to them that happened to my sonys. what could be causing this?!? I have been leaving them on the charger overnight, could this do something?? I also noticed when I first bought the efests the charge time was pretty long, now im seeing they charge faster... im just looking for someone with advanced battery knowledge to help me figure this out

There is your problem in my opinion...

 

[Choc_Addic]

Test your battery voltage with multimeter after charging fully and let it rest for at least 10 minutes.

Report back.

I don't know if you can trust the meters on the charger. Are you seeing the same on your VV VW mods?

after about 15 minutes of use they would be back to 1/3 life (as shown by the light indicators on my nitecore i4 charger)

Means nothing.
As far as what you have said in OP, you really don't have problem as far as you actually can prove.

Cheers

 

[element9633]

a freshly charged battery is reading 4.18v. that is on an efest 2250mAh 18650. but its a 3.7v battery, is this overcharging?

oh and another battery that was showing 1/3 charged bars is at 4.01

 

[Underwhelmed]

I wrote a thread the other day explaining a problem with my vtc4s. I used them for about a month, then started noticing they were not holding charge. after about 15 minutes of use they would be back to 1/3 life (as shown by the light indicators on my nitecore i4 charger). I bought a couple efest batteries as replacements the other day, and they were working great. now only a few days later, I am noticing the same thing happening to them that happened to my sonys. what could be causing this?!? I have been leaving them on the charger overnight, could this do something?? I also noticed when I first bought the efests the charge time was pretty long, now im seeing they charge faster... im just looking for someone with advanced battery knowledge to help me figure this out

What resistance are you running? What device?

We need more details.

 

[mvroman]

There is your problem in my opinion...

I have done the same thing with ALL of my batteries on the same charger they are using and don't have this issue. I'm wondering if it is maybe a defect in the PV they are using that is causing the batteries to over-discharge.

To the OP, buy a Digital multi - meter and check the voltage of ALL of the batteries in question, before and after charging and then before and after you use them in your PV for a short amount of time.

Also, sorry if I missed this, but what device are you using these batteries in? What ohm coils are you using?

Sent from my SAMSUNG-SGH-I337 using Tapatalk

 

[k702]

a freshly charged battery is reading 4.18v. that is on an efest 2250mAh 18650. but its a 3.7v battery, is this overcharging?

oh and another battery that was showing 1/3 charged bars is at 4.01

a 3.7v bat will charge to 4.2

I remember in your other thread you were saying you were running at pretty low ohms, batteries don't last as long when you're sub ohming.

 

[VA Vince]

I have done the same thing with ALL of my batteries on the same charger they are using and don't have this issue. I'm wondering if it is maybe a defect in the PV they are using that is causing the batteries to over-discharge.

To the OP, buy a Digital multi - meter and check the voltage of ALL of the batteries in question, before and after charging and then before and after you use them in your PV for a short amount of time.

Also, sorry if I missed this, but what device are you using these batteries in? What ohm coils are you using?

Sent from my SAMSUNG-SGH-I337 using Tapatalk

Didn't think about a defect in the ops PV. I am still new to this and when it comes to batteries and being charged, I keep an eye on my charger.

 

[Choc_Addic]

a freshly charged battery is reading 4.18v. that is on an efest 2250mAh 18650. but its a 3.7v battery, is this overcharging?

That is correct. Freshly off the battery charger should show between 4.1V to 4.2V.

oh and another battery that was showing 1/3 charged bars is at 4.01

Now that shows you can't trust the battery bar meter on your charger!

You really have no problems with your batteries or the charger other than the fact that your charger's meter not showing correctly but charging ok.

B4 I forget, Congrads on getting a good set of batteries and even the fairly good charger (forgive the battery bar).

Cheers and peaceout!

 

[element9633]

That is correct. Freshly off the battery charger should show between 4.1V to 4.2V.

Now that shows you can't trust the battery bar meter on your charger!

You really have no problems with your batteries or the charger other than the fact that your charger's meter not showing correctly but charging ok.

B4 I forget, Congrads on getting a good set of batteries and even the fairly good charger (forgive the battery bar).

Cheers and peaceout!

hey everyone thanks for the input! choc addict you are exactly right! I have been using my multimeter to check the charge of my batteries, and even when the charger is showing 2/3 bars, they will be at 4.18v. so the LED indicator of battery charge is wrong, but they are charging!! guess when I would see the led showing 1/3 charged I would subliminally feel I was getting weaker hits. thanks for the input, helped me figure my situation out!!!!!!!!!!!!!!!!!!!!!!!!!!