Battery Charging

Hi
I just got a Xtar VC2s charger for my 21700 batteries (Samsung 40T).
Chose that charger also because it "charges at safe low current".

When it charges 2 batteries, it's at about 1000 mAh for each battery. All good.
But when charging only one battery, it charges it at 2000 mAh. Hmm?

I assume 2000 mAh is still "safe".. But won't that reduce lifespan on the battery?

The charger manual says "when the power supply is insufficient, the charger will reduce the charge current correspondingly".
So maybe I should get a usb power supply with like 1000 mAh output?

I will only be charging one battery at a time, and prefer charging slowly if that gives more safety and lifespan.

But I don't know if charging at 2000 mAh is really an issue..  

I just got an istick 30w the other day from a local tobacco store. I bought an istick 30w for $45 which isn't too bad, I'm having problems with it not charging to full. I am using a 1a rated charger and it is supposed to charge to full in exactly 2.5 hours with a dead battery. I cannot get it to charge above about 75-80%, no matter what I do. As of now it's been on the charger for 2 hours and 38 minutes and is at about 80%, and is showing no sign of continuing to charge.

When I leave the device on overnight, I will wake up and it will be at around 65%, and it would have just stopped charging. I don't understand.  

I'm charging a purple EFEST IMR battery in an XTAR LI-ION battery charger and I wanted to make sure Efest IMR purple is actually covered under LI-ION charging.. I can upload pictures in a second but I've been charging the battery for about an hour and this is my first electrical mod so I am trying to make sure, thank you. It says it is for rechargeable Li-ion batteries only but so far the battery is not hot or any problems  

So last night I guess I was more tired than I anticipated and forgot to unplug my charger before knocking out. I was charging a 18350 battery. As soon as I woke up I remembered and immediately unplugged the charger. I left the battery sitting all day and just checked it on my multimeter and it reads 4.18 volts. I also checked it on my sigelei and it read 4.2 volts. I am th overly cautious type though so I just wanted to ask you guys if you think the battery is still safe or if I should properly dispose of it.  

I've been charging my 18650 batteries on a Nitecore charger but having to unscrew my Smok XPRO m65 is a real pain so thought I may as well make use of the USB port and charge the battery while it's still in the mod.
But I've been hearing a few horror stories of other mods such as the clouper, apparently its not safe to charger using the USB port

I'd really appreciate it if anyone can help inform me if I'd be able to use my phone charging adaptor with my mod.

The input and output specs of my phone charger and mod input are in the attached pics.

Cheers everyone  

intstalled 2 sony vtc 5's in my new nitecore d2 that i just received today. both bays indicated low charge with 1 bar on each meter. 3.67v for bay 1 and 3.62v for bay 2. an hour later bay 1 has 3 bars, 3.88 v and bay 2 has 1 bar, 3.71v. seems bay 2 is not charging. is the charger or battery acting up?
after bay 1 finishes can i install the battery not charging in bay 1 to test.  

So I have a SMOK M80 XPRO PLUS that I got a few days ago. Just wondering is it safe to use a phone charger to plug it into the USB port on the bottom?

My uncle, who I stay with, watched some news article about someone's battery blowing up in their apartment and just wants to make sure I am charging this thing safely. I have been using my phone charger up to this point, with no issues.

Any feedback would be greatly appreciated! Thanks!  

I have an orbit cannon vape pen. I believe it's 510 style.

I bought it 5 months ago. I just got around to using it. You press the button 5 times, and it turns on, press it 5 more times and it shuts off. The light also indicates the battery voltage. It turns white when fully charged, and then blue, and then red when it's almost dead. There is also a light on the charger that is red while it's charging and then it's supposed to turn green when it's done charging.

Well, the e cig battery light stays white for a short while, and then turns blue. It used to stay white longer. It's like after a short bit of usage, it goes blue. The red light on the charger also never turns green no matter how long it stays plugged in.

The e cig stayed in the box, and the battery was depleted. I picked it up a few days ago and put it on the charger to start using it and noticed this.

Does it sound like the battery is messed up? Last night I charged it 3 hours and the red light on the charger never turned green so I unplugged it. The light on the battery was white. Today I went to use it, and the light was blue - I never used it and the e cig itself was turned off.  

My charger has those eeh springy slides to keep batteries tightly set.
Couldn't find a respectable charger without them.

How do you avoid damaging the battery wrap when inserting/removing in a charger?

Inserting a battery is easier as you can preload the slide with a finger.
But when removing a battery the spring slide eats into the battery wrap on the way up.
Would be nice to avoid any wrap damage.

Maybe put a rubber band / twine / other (non-conductive) underneath so it can be pulled and open the spring slide after charging?
Like a slingshot
Other ideas?  

Can I use an external battery pack to charge an IPV Mini?

I have a 10,000mAh external battery to charge my cell phone (Note 4, with a 3500mAh battery), which has 2 options for charging: 1.5v=1A and 2.5v=2.1A.

Is it recommended? Is it safe? Are there any precautions I need to take if I use the battery pack?

I haven't gotten around to getting an extra 18650 battery (and charger) for the IPV Mini. I've finally realized that it takes maybe 2-3 hours to charge the battery via the USB cable. But the one battery doesn't quite last me all day, depending on how heavy I'm using the Mini.

I usually carry a Volcano Inferno once the Mini dies, but the Volcano really sucks in comparison to the Mini. I'd love to be able to charge the Mini while I'm out and about.

I've added a pic of the external battery for specific information.


Thanks for all your help.