Best Deal On High-end Batteries? Who Knows Where To Look?

Hi
I'm usually vaping at just 14 watt (mouth to lung, nothing heavy).

Now I'm soon getting a new mod that takes 21700 batteries, so I'm searching for the best batteries without spending too much or too little.
(aiming for Samsung, LG or Sony, to be safe)

I see some batteries hold 5000 mah, like the Samsung 50E (cyan).
But it only has about 10 amp discharge rate.
So less than half than "regular" 4000 mah batteries for example.

Is 10 amp more than enough for vaping at just 14 watts, or should I find a more "high-drain" battery?
I want to be safe and avoid risks or heat.  

Hi everyone,
Hope your all having a great weekend! Hopefully someone can help me figure out any good canadian or American reputable vendors for 18650 batteries for my arrow sense mod. Out of all the vendors listed in the battery thread, only one had the batteries I wanted, but it was in the US and would cost over $50 for shipping. Hoping to find shipping for $20-30 canadian instead. I am particularly interested in the batteries on the forums listed as tested by mooch in a stickier post. Or Sony battery with 2500 mah , I like to vape with two 18650 batteries at 60-80 watts.  

I have a pair of new batteries that are green 18650's that say "Danger: Do not use outside of battery pack." The numbers are very faint but appear to be SE US 1865 UTC6 C6/ G 0964 8812K05P 144. I don't remember when I bought these or where from, but I buy only at reputable batteries sites. Any help would be appreciated. I am afraid to use them.  

Taking the advice of ECF members, I'm planning on buying Samsung INR18650 25R batteries for a 30w device (as opposed to my current Panasonic that has a 6ish max amp output). My local vendor has them, but two things are strange to me.
1.) Their price is actually a little cheaper than Fasttechs, usually products there are quite more expensive
2.) They are green, while FT and a couple other places i've googled has them as blue

This is the vendor site:
Baterija Samsung INR18650 25R 2500mAh - 18650 - Li-on, Ni-Mh baterije - Baterije i punjači E cigarete | E tekućine
This is how they look pretty much everywhere else:
$9.75 Authentic Samsung INR18650-25R 3.6V 2500mAh Rechargeable Li-Ion Batteries (2-Pack) - 35A peak discharge / 22A continuous discharge at FastTech - Worldwide Free Shipping

So are the batteries from the first site fake or what's the deal with that?
 

I ordered two of these batteries from FastTech. The cheap price and high capacity (without having a mod or some awkward huge battery) attracted me to them. Some two weeks later they show up...

I have two Puff King chargers that came with starter kits we bought at a B&M store. We've been using them with Tripl3 eGo batteries, one Puff King battery (and another Puff King battery, which was taken back and exchanged for another eGo-T battery, which broke), and so far no problems screwing any batteries in. These two from FT show up however and neither will screw into one Puff King charger, but they both did into the other (same charger, down to the model number and everything). Now, one battery from FT still screws in, but the other doesn't.

I took the non screwing in battery to a local B&M store and the guy there was able to screw it into one of their chargers. He handed it to me, and I unscrewed it, screwed it back in, unscrewed it again, and then neither of us could screw it in again. Now I have one battery from FT that will screw into one of my chargers, but not the other. The other battery will charge, but it has to just like sit in the charger and hope the connection stays okay for it to charge. I still have no problems screwing any of my other batteries into either charger, just these ones from FT. Also, it's worth mentioning that the FT batteries never seemed to screw in right... it always felt weird and finicky getting it to go in.

What's up with these batteries? They claim to be eGo/510 threaded, just like my other batteries. They look just like my other batteries too, except they won't screw in right...  

I bought my Sigelei 100w Plus a few days back and ordered 2 Sony VTC4's on my same order (I'm confident they're legitimate, I've bought some before) to be able to marry them together and use them with my Sigelei. Upon receiving the batteries, I labelled one A, and one B and put them into my charger at the same time (charger was off, put both in and turned it on), one battery is slightly more charged than the other (it's 2/3 bars, while the other is still 1/3). I'm a bit worried about using married batteries, I understand rotating A and B in my Sigelei and charger but will they be the same charge when they're done? They're new batteries and they both went on at the same time yet one of them is charging a little bit faster.

When both of the batteries are fully charged, will they be safe to use and cycle accordingly? I heard about if one battery has even a tiny bit less, the batteries will take an uneven load and it will make it risky. How do I ensure that these batteries remain married?  

Hey guyz,i am planning to buy a mtl setup and was wondering how to decide on good battery as i cant get a good explanation to the terms being used.i plan to vape around 15-25 watt and am looking for a 18650 battery that can last me well.i also saw people saying that sometimes its better to go for more amps than mah.So i was hoping someone can help me understamd as well as decide in some batteries  

Before I started being interested in mechs I had rewrapped my collection of batteries.

How do I find the CDR of a battery if it has been wrapped. Do I need to purchase new batteries for mechs?

I have mostly Fogstar batteries but cannot find Fogstar CDR's for 18650s or 21700s in the battery tables I have found.  

I had thought Segelei was one of the better tanks out there but seems that coils burn out easily. Been using below stated wattage for the most part. Recently got a freemax tank and the difference is night and day. I have a fuceli mod. 2 batteries 20 amp (25r or similar... All are either sony.,samsung or another recommend brand) and have no issue using at 80watts. The coil is not having issues tank is easier to filll(though my dumba** figured out that top slides by accident). I dont know the max that the battery can go to but if i believe with info i got here before with 2 batteries i should be good  

So I have (2) 3100mAh Efest batteries rated @ 20A and (1) 2500mAh Efest batterie rated @ 35A. I'm experiencing a pretty annoying problem with all 3 of them and that is they aren't lasting nearly as long as I feel they should be. I can EASILY vape through a battery in less than one hour while heavy vaping. I'm aware that I am sub-ohming and that requires more power from the battery but these are just going way too fast and something isn't right. I have a BEC Pro mod that takes a single 18650 battery and I'm vaping an Aspire Atlantis tank @ 35 watts with the .5 ohm coil installed. I charge each battery fully with a Nitecore i2 before using them and it'll say 4.2V on my mod & on my Smart BEC app it will say 100% as I take my first few puffs but then starts draining at a ridiculous rate until they are dead. I am not aware what the mod efficiency is on my BEC Pro or if there might be something not working properly within my device. Can someone please help me find what's wrong with these? Maybe some of you have eperienced this problem with Efest batteries in the past? Thanks in advance!

Edit: These are genuine Efest batteries as I bought them straight from the manufacture on Ebay.