18650 Battery Question

[State Of Zen]

On average, how long would you say it would take to charge two Panasonic IMR 2900 mah 18650's on a wall charger built for 2 batteries? If this helps, I have a i2 Nitcore charger. I have read on ECF where some people have had bad luck with them, while others had no problems at all. I had them both charging at the same time for 75 minutes and it seemed like things were getting a bit too warm for my taste (maybe I'm just paranoid), so I unplugged and thought I would let it cool off and charge them some more tomorrow. Would I be better off just trying to charge one at a time even though its built for two? Thanks in advance.

 

[WarHawk-AVG]

They will get warm...if they get HOT (as in uncomfortable to touch)...unplug it

 

[TheSystemHasFailed]

Peace of mind is priceless, but you are definitely paranoid.
Sounds like runoff from sub-ohm fear mongering.

Full circle.

You'll be alright...but don't lose any sleep over me...

Aside from that, I/we need to know the output of the charger. If it does 3.6 at 600 mAh, watch it.

From what I've gained, you want to charge less-safe chemistry's at 3.7.

 

[State Of Zen]

They will get warm...if they get HOT (as in uncomfortable to touch)...unplug it

Okay, thanks. I guess I'm just overreacting to the forum posts as of late. How long would it take 2 of them to charge simultaneously, on average? Just trying to get an idea. I'm new to batteries this big. lol Sorry for being such a n00b. hehe

 

[TheSystemHasFailed]

They will get warm...if they get HOT (as in uncomfortable to touch)...unplug it

Also: look both ways when crossing streets.

 

[Abbell]

Charging two at a time won't affect that charger. I fried one half of mine and had to return it. Each side of the two battery charger works independently. Expect at least 4 hours recharge time.

 

[State Of Zen]

Peace of mind is priceless, but you are definitely paranoid.
Sounds like runoff from sub-ohm fear mongering.

Full circle.

You'll be alright...but don't lose any sleep over me...

Aside from that, I/we need to know the output of the charger. If it does 3.6 at 600 mAh, watch it.

From what I've gained, you want to charge less-safe chemistry's at 3.7.

This is the charger: https://www.fasttech.com/p/1327201

These are the batteries: https://www.fasttech.com/p/1233700

Hope that helps.

 

[TheSystemHasFailed]

This is the charger: https://www.fasttech.com/p/1327201

These are the batteries: https://www.fasttech.com/p/1233700

Hope that helps.

Just charge them when you are present.

EDIT: The batteries and charger, if as is, are great. Fear not.
Always expect the unexpected though.

 

[90quattrocoupe]

Good batteries, and a good charger.

Greg W.

 

[Jsucool76]

Like others have said, they do take a while to charge. I'll leave mine on the charger as long as im in the house, but if I'm going out (For more than like..10 minutes to walk my dog or whatever) i'll usually unplug the charger because I don't want to leave them entirely unattended.

 

[Arnie H]

I don't have the charger in question, just my "trusty" trust fire charger. For me it takes forever, so it is difficult not to leave them unattended while charging. A fire/proof/resistant charging bag or the use of a vapesafe fuse whilst charging should minimize the risk. But pretty safe otherwise.

 

[Ryedan]

On average, how long would you say it would take to charge two Panasonic IMR 2900 mah 18650's on a wall charger built for 2 batteries? If this helps, I have a i2 Nitcore charger. I have read on ECF where some people have had bad luck with them, while others had no problems at all. I had them both charging at the same time for 75 minutes and it seemed like things were getting a bit too warm for my taste (maybe I'm just paranoid), so I unplugged and thought I would let it cool off and charge them some more tomorrow. Would I be better off just trying to charge one at a time even though its built for two? Thanks in advance.

IMO, if batteries are getting warm while charging they are being charged too quickly. I would not keep using a charger that did that. Just my

 

[jow350]

IMO, if batteries are getting warm while charging they are being charged too quickly. I would not keep using a charger that did that. Just my

I agree, at least until I would be able to check it with an Amp meter... I use an eFest LUC, it charges 18650s at 1A, and I've never had a battery get warm on me.

 

[Coastal Cowboy]

One thing about these newer IMR 18650 batteries with ungodly capacities (I have a pair of NCR18650B IMR's rated at 3400) is that it takes a lot of time to safely restore that capacity on the charger. I had a single 18650 battery last me all the way through the Labor Day weekend and it took ~5 hours to charge it yesterday.

 

[jow350]

And I don't see how a SafeVape fuse will provide much protection at all... They don't kick in until the amperage is above 5A to 7A, at which point most chargers will have most likely already melted (never mind what the battery does, they could potentially vent/catch on fire/explode above 2A), and they offer no protection whatsoever for over-charging the battery, as in charging the battery above 4.2V... I think the best protection here is to buy quality batteries which are designed and tested, as much as possible, to not misbehave when over-charged.