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is less sometimes better?
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Redgotcloudz Offline
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Post: #1
is less sometimes better?
So right now in my kangertech topbox mini I'm using a Imren 3200MAH Max 40A battery.  started having a problem where my mod won't fire up. I know it's not the coil or tank because they are both new. I went to a shop and was told the battery I have is too strong for the device, even though I've been using it since I got the mod. He recommended using 25a-30a  battery. the screen reads the ohms correctly and shows a voltage when fires but the coil doesn't heat up. Sometimes it will fire for a few seconds and sometimes I somehow get a dry hit even though I haven't used it.   can anyone confirm this might be the issue for my device? and would this be a good buy ? http://vapenw.com/sony-vtc4-2100mah
(This post was last modified: 01-10-2016 03:27 PM by Redgotcloudz.)
01-10-2016 08:18 AM
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paulS Offline
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Post: #2
RE: is less sometimes better?
The battery is not too strong - it is a bad battery. Imren's are rewraps and often wear out after too few cycles. Now I'm assuming they tested your mod with a different battery to confirm it was a battery issue? BTW, there is not a 18650 battery on the market that does 40A. Imren's are lucky to hit 20A. Companies like Imren misrepresent the values. Sony VTC4 were the gold standard but Sony does not make batteries anymore and most Sony's are fakes. I wopuld stick with Samsung or brown HGs.

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(This post was last modified: 01-10-2016 08:28 AM by paulS.)
01-10-2016 08:25 AM
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Don Offline
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Post: #3
RE: is less sometimes better?
Unfortunately there are now fake brown LG cells too. If the price is too good to be true....

TVF tested battery info to be found here

http://www.preventsuicideapp.com

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01-10-2016 08:32 AM
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TinWhisker (06-27-2018)
Fatboy Offline
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Post: #4
RE: is less sometimes better?
Red, I've be concerned with those batteries.... I tend to buy my 18650s from Amazon - if for any reason they turn out to be fakes, Amazon will do more than tell you to read the small print......

I'd be suspicious of the shop you went to as well....did they by any chance offer to sell you the right ones? Smile
01-10-2016 11:47 AM
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TinWhisker (06-27-2018)
gentlydoingit* Offline
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Post: #5
RE: is less sometimes better?
They sound like salesmen who vape rather than vaping enthusiasts who sell. There's several shops close to me but only one who's opinion counts. 

Don't forget to apply for the freecycle section!
http://www.thevapingforum.com/Forum-FreeCycle--191
01-10-2016 11:54 AM
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Michael Offline
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Post: #6
RE: is less sometimes better?
Yeah, there's no such thing as a battery that's too strong for your device so I'd avoid going to that shop ever again. 

Samsung 25Rs are what you need. They're 20A cells, which is close to the best. The only cells with a (slightly) higher amp limit are Sony, but like Paul said there are more fakes than genuine these days. 
01-10-2016 11:58 AM
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Redgotcloudz Offline
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Post: #7
RE: is less sometimes better?
Thanks, fellas. I didn't know when I purchased the battery with the device. I got both off eBay as a package, which I know some would advise against, but the according to the kanger website the device is authentic. So, in reality, any amp battery would be fine ? Weird thing is he didn't try to sell me a battery but told me what kind of batteries are best, LG and Sony. Anybody have a good site to buy authentic batteries from?
(This post was last modified: 01-10-2016 03:40 PM by Redgotcloudz.)
01-10-2016 03:38 PM
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Fatboy Offline
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Post: #8
RE: is less sometimes better?
Hey Red, there are many battery specific sites but honestly I buy mine at Amazon. Minimal or no shipping fees and super fast delivery.
01-10-2016 03:56 PM
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Redgotcloudz Offline
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Post: #9
RE: is less sometimes better?
(01-10-2016 03:56 PM)Fatboy Wrote:  Hey Red, there are many battery specific sites but honestly I buy mine at Amazon. Minimal or no shipping fees and super fast delivery.

ok cool, thanks. just bought 2 Samsung INR18650-25R hopefully I'm back to vaping by Monday.
01-10-2016 04:24 PM
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Michael Offline
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Post: #10
RE: is less sometimes better?
(01-10-2016 03:38 PM)Redgotcloudz Wrote:  So, in reality, any amp battery would be fine ? 

Not exactly. Any of the high-end batteries will be fine. There are 18650s with lower amp limits, some around 5A, others around 10A, and the best ones are around 20A, with the Sony maxing out around 20-25A. Those lower ones (5A, 10A) should only be used in low-power mods, or flashlights if that's your thing (we have several users, myself included, who enjoy high-powered flashlight modding which in some cases can use low-amp 18650s). 

The main thing to worry about if you want to know which batteries to use is learning to use Ohm's Law. With Ohm's Law, you can calculate the amps used by a coil at a certain wattage and resistance, so you know to use a battery with a higher amp limit than that. So for example, if you want to use a 0.5 ohm coil at 50W, using Ohm's Law that equals 10A, meaning that coil at that wattage will draw 10A from the battery. So as long as your battery is above 10A, that combination would be fine. On the other hand, if you want to use a 0.2 ohm coil at 80W, that equals 20A so you'd need a battery with a 20A limit for that. 

Here's a link to an Ohm's Law Calculator if you want to play around with the numbers. But it doesn't hurt anything to use a battery with a higher amp limit than you need, so we usually just recommend people get the best so you'll have room to grow and use it however you want without needing to get new batteries if you decide to change your coils to a different resistance.

The Samsung 25Rs that you ordered are among the best, so you'll be fine. Just wanted to give you a quick crash course on Ohm's Law in case you find it interesting or for future reference Smile
01-10-2016 06:01 PM
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