How many mAh do I need?

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DaveP

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May 22, 2010
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Hi, I’m kinda new to vaping. I just ordered an Innokin Plexar vape, and now i’m looking for batteries! I’m buying a 18650, since the others aren’t really available here. How many mAh do I need to get the optimal vaping time out of my device? Thank youuuu!

What's your normal vape setting (wattage)?

As your wattage goes up the amperage (current) drawn from the battery rises in proportion. With lithium cells there's a trade off between amperage capacity and MAH (MilliampHours). High amp cells generally have lower MAH ratings than lower amp cells. Higher MAH ratings yield more vape time, but you also have to match cells to amperage draw.

MAH translates to vape time. AMP ratings refer to current capacity. The higher your wattage setting the more amperage you pull from the battery. At some point you have to choose a battery that can provide high current over one that delivers more MAH.

Go here for some info about which cell to choose (and why).
The Best 18650 Batteries for Vaping [June, 2020]
 
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UncLeJunkLe

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Choose your battery according to amp rating, not so much mah.

The following video will show you how to calculate what amp rating you need in a battery to be safe and to suit whatever wattage you vape at (not how many watts your mod goes to, rather what wattage you set it at).



Then find the batteries from the second 2 columns on this graphic that have amp ratings that are suitable/safe for you. If the image below is too small for you to read, click on it and it should enlarge. If it doesn't, try this link.

164ff016-f4d4-4cd9-bffa-5633214a61be-jpeg.889007
 
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Hawise

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Mar 25, 2013
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the vape goes to 100W, so would 2500/3000mAh be okay?

Unfortunately, the '100 watts' refers to the capability of the mod's circuit board and fails to account for the fact that there is no 18650 that can safely provide 100 watts. The highest you should get with a single 18650 is 90 watts, but if you choose those batteries you won't get much battery life. If you limit yourself to 75, 60 or even 45 watts, your options start to improve.

At 75 watts, you're looking at around 2,500 mAh, but that doesn't mean that any battery with 2,500 mAh will do. Some models will simply fail to fire your mod, some will work well, some will work poorly and some will come with the risk of blowing themselves (and your face) to bits at 75 watts. That's why we're asking what wattage you want - so we can recommend a specific battery make and model that should work well for you.

It's also really important to buy your batteries from a reliable vendor. Counterfeits abound, and you want to reduce your risk of ending up with one. Some of the better vendors are listed in the blue row on the chart @UncleJunkle posted above.

So, pick your top wattage and we'll be happy to tell you what you need to look for. Good luck!
 

VapeyBaby

New Member
Jun 22, 2020
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If you are new to vaping, just stop vaping. Not healthy. Being a vaper and not a former smoker is just plane stupid.
what’s your issue? i’m an ex smoker and i also use vaping to deal with my anxiety. you’re not cool just because you assume .... about others.
 

PeterKay

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May 1, 2020
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if you watch my video.mike uses a Samsung 30t and 40t:D
True but that's with 0.14 ohm coil. But there are different coils for that tank, or you could use a different tank in the future. You won't learn much from mike's vid about batteries, regardless of how good a review it is (I saw it before). I read that table and watched the vid @UncleJunkle posted when I first joined this forum 3 months ago, and never had to ask again about what batteries am I going to need for different setups.
 

Hawise

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Mar 25, 2013
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okay so if im a high voltage (80-90W) vaper, would an at least 4000mAh 20700/21700 battery be okay?

Only if it's a Molicel P42A. The other 4000 mAh 20700/21700 batteries don't have a high enough CDR to get you to 80 - 90 amps safely. Actually, your best bet would probably be the Samsung 30T, which has only 3,000 mAh but has a CDR of 35A.

Why the obsession with capacity (mAh)? CDR is far more important.
 

PeterKay

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May 1, 2020
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Why the obsession with capacity (mAh)?
It seems to be common knowledge (or rather misconception) that the higher the mAH's, the longer the battery life. I guess it comes from everyday use of AA, AAA and power tool batteries. My cordless li-ion batteries for my tools only have mAH's, and infofrom manufacturer about what brand cells they used. I never opened any of the batteries to check the CDR of the cells inside. Same with rechargable AA batteries I used before- I would check mAH's and buy the ones with highest. So yeah, I was there a few months ago :D until I came here anyway
 
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