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Efest IMR 18650 2600mah 40A Battery - Flat Top
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Michael Offline
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Post: #11
RE: Efest IMR 18650 2600mah 40A Battery - Flat Top
(08-02-2016 02:52 AM)gentlydoingit* Wrote:  You'll find the best batteries don't have their vital stats plastered all over the wrapper to entice inexperienced vapors to buy them Wink they're primarily produced for packs in things like laptops etc, there aren't any I can name MADE for the consumer vaping market. 

There are a few cells out there that claim to be made for vapers... But they're lying. I've come across several brands claiming to be made for vaping, but upon closer investigation, they're either rewrapped LGs, or rewrapped crappy Chinese cells overstating their amp limits by magnitudes of ten. 
08-02-2016 04:27 AM
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Don Offline
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Post: #12
RE: Efest IMR 18650 2600mah 40A Battery - Flat Top
Ain't no such thing as a 40A 18650. Not even close!

There is a tradeoff, you can have capacity or current, not both.

Probably the best cells for current output are the Sony VTC3 cells which are only 1600mAh. Even they will struggle past 30A.

The highest actual capacity 18650s I'm aware of are around the 3600-4000mAh rating. But they can't do much more than 5-10A.

Usable capacity drops like a stone when high currents are pulled from them. To the point that on a DNA200, a 3 cell lipo pack of 900mAh capacity will let you vape longer than three 2500mAh 18650s rated for the currents involved.

Not that I vape at anywhere near 200W. You need crazy airflow and lungs of steel to do that.

TVF tested battery info to be found here

http://www.preventsuicideapp.com

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08-02-2016 07:10 AM
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Michael (02-08-2016)
KingJohn Offline
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Post: #13
RE: Efest IMR 18650 2600mah 40A Battery - Flat Top
Thanks, problem now is I found a local shop that has box mods, but from what I see on the internet batteries are all being sold separate at around £8

Perhaps ill take a list of the above comments with me, if they recommend one of these batteries AND tell me about them should be fine.

All day :- Was expecting several days use, perhaps the box mod should have 2 batteries then, charging them everyday like that they aint going to last long at all.

I dont know what vape wattage Ill be using, do people start very low and want more and more power and more and more vape.. Just as bad as smoking ?

My thinking is, If I need a 10A battery, buy a 20A. Get a box mod that does 50W but use it at 20W, so things are running under power, last longer, and a lot safer ?
08-02-2016 12:20 PM
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Don Offline
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Post: #14
RE: Efest IMR 18650 2600mah 40A Battery - Flat Top
People vary a lot in power usage. Some folks are happy with less than 10 watts.

Some people use power levels more commonly associated with welding!

Essentially, if you do direct lung inhales you want at least 40-50W, possibly more, if you mouth-lung inhale like just about everyone smoked, you are unlikely to want more than 30W, maybe 40.

Yeah - it is probably better to over specify and run things well inside their limits. Given the availability of good cheap regulated mods, it needn't cost that much either.

On special offer, you can get neat little 50W mods for under £25. They'll need a decent battery in them as the 50W ones will draw up to 23A. I'd say go for LG HE/HG or HB cells or Samsung 25R's.

TVF tested battery info to be found here

http://www.preventsuicideapp.com

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08-02-2016 12:43 PM
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gentlydoingit* Offline
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Post: #15
RE: Efest IMR 18650 2600mah 40A Battery - Flat Top
Only get a battery suitable for the mods max output.. you'll want to try it at least once, and we want you safe!
Dual batteries should last all day with moderate vaping
As Don said, a mod with a built in lipo might suit you better

Don't forget to apply for the freecycle section!
http://www.thevapingforum.com/Forum-FreeCycle--191
08-02-2016 12:44 PM
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Michael (02-08-2016)
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Post: #16
RE: Efest IMR 18650 2600mah 40A Battery - Flat Top
Right, Im back from the vape shop with some goodies. Lots of guys in the shop standing around vaping and chatting, most if not all were using items bought from the shop. When I show my list, most were saying well they are older make battries.

So bought a Kanger subox Mini, which also comes with a RBA, others were fixed OCC coil , heads.7W to 50W 0.1 steps, 0.3 ohms to 16ohms

Well since there were lots of people in the shop, and they were selling IMREN 3000mah 40A, I got to look inside the mods people were using, they all had this battery, so I bought 2
  • Nominal Voltage: 3.7V
  • Capacity: 3000mAh
  • Peak Voltage: 4.2V
  • Lowest Discharge: 2.5V

  • Standard Charge: CC/CV (Maximum Charging Rate: 1.5A)

  • Cycle Life: > 500 Cycles

  • Continuous Maximum Discharge Rate: 40A
Waiting for them to charge before I can try. Well its a start, can still use that triton tank if I want, and perhaps learn a lot from this unit, and if batteries give problems try some others.
08-02-2016 02:15 PM
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gentlydoingit* Offline
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Post: #17
RE: Efest IMR 18650 2600mah 40A Battery - Flat Top
Yep, you just bought a lghg2 rewrap.. should be marvelous.
Your vape shop sounds swell. Do you mind me asking the price of the batteries?

Don't forget to apply for the freecycle section!
http://www.thevapingforum.com/Forum-FreeCycle--191
08-02-2016 02:24 PM
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Michael (02-08-2016)
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Post: #18
RE: Efest IMR 18650 2600mah 40A Battery - Flat Top
Imren's are one of the better rewraps. They are not the worst battery you can buy. They are okay but like a lot of batteries list there ratings too high. It is closer to: 

18650 2900mah 30A continuous is 20A;
18650 2600mah 38A continuous is 25A;
18650 2000mah 40A continuous is 25A;

He also tested my current battery - the Tesiyi - which outperformed or was equal to almost every battery on the market. It did not get hot during his tests. But agin ... it is rated too high. It is a true 25A like the samsung but does not heat up as much.

There are a lot of people testing batteries. Google Mooch. He has tested most of the batteries. The current lists are pretty good. Overall the best in testing was the Samsung 25R with the VCT4 coming close (but there are a slew of copy VCT4s out there). Now Tesiyi has joined that group and the HGs are close behind these (good because again they tend not to overheat at all). You also have MNKE and AW batteries that are decent enough. The MNKE have 26650 which is why we use them. Much better than the Efest 26650 for sure.

Don is spot on - there is NO 40A battery. You can batteries that PULSE at 40w but not a continuous rating of 40w. But the better batteries have continuous 25w which in most cases is fine. However, building below .15 on mech mod single tube will tax ant battery I have and I need to watch how hot my mods gets. The Tesiyi performed best for me with tube mods. 

Now what you need to watch with batteries is the wraps and their age. When they stop recharging as fast and drain quicker change them out. If you knick your wrap - rewrap your bloody battery. I've seen people using batteries that would scare the hell out of me! In Montreal most of the B+Ms push Efests. For the life of me I cannot figure out how experienced vapors can buy them. In Toronto you see a lot of the LG yellow batteries which are LG4s. They are quite decent.

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08-02-2016 03:13 PM
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gentlydoingit* (02-08-2016)
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Post: #19
RE: Efest IMR 18650 2600mah 40A Battery - Flat Top
When the guys at your shop said these are mostly older model cells, they're right. Samsung 25Rs and LG HE2s have been available as long as I can remember (so, at least a year or two lol). But battery tech hasn't evolved much at all since the 70's, and cells that were invented two years ago or five years ago can be just as good as the new ones. In fact, in many cases they're exactly the same, since most of the new ones are just re-branded. They put a new shrink wrap on a LG HE2 and call it Imren. They put a new shrink wrap on a VTC4 and call it Orbtronic. It's all just branding, and newer does not necessarily mean better. Or in some cases, they're just bad cells making dangerous claims. Sounds like your shop has good ones though. 
On a related note, has anyone here had experience with the new green Samsung 25Rs? Mine are all blue, but I saw some green ones on FT, from what I can gather it seems they have exactly the same output specs but are supposed to last for twice as many cycles. 
08-02-2016 03:40 PM
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gentlydoingit* (02-08-2016)
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Post: #20
RE: Efest IMR 18650 2600mah 40A Battery - Flat Top
I've got both. I'll probably offend here but I don't rate either. They're both good on a full charge but tail off too quickly, prefered the blue for power. I do punish my cells a bit in mech.. though I have 3 greens for my wismec that don't last nearly as well as the effest 2900's that it came with. Given that fact I'm disappointed with them tbh.
I have probably just shunned myself Confused

Don't forget to apply for the freecycle section!
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08-02-2016 03:54 PM
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