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These batteries any good?
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stev32k Offline
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Post: #1
These batteries any good?
On the advice of my local vape store I purchased two IMREN batteries to be used in a Kangertech NEBOX.  The batteries are rated at 3,200 mah and say Max 40A.  On the battery it says 3.7V, but when fully charged I measured 4.28V. 

On a related question I came across this chart: http://onvaping.com/battery-safety-and-ohms-law/ If I am reading the chart correctly I should limit the voltage to about 3.7V with a 1.5 ohm coil.  Is that right or have I missed something?
14-05-2016 11:21 AM
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gentlydoingit* Offline
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Post: #2
RE: These batteries any good?
The battery specs are fictitious. And coming in at 4.28v is a worry too, what charger are you using? The chart on your link looks somewhat out of date, or perhaps targeted toward non sub ohm..

I suspect the battery will handle any of the nebox coils, but without knowing what cell is under the wrap it's hard to say for sure, have to trust the shop I guess.

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14-05-2016 11:23 AM
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Don Offline
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Post: #3
RE: These batteries any good?
If they are reading 4.28V off charge, assuming a decent meter is used - (most multimeters are pretty accurate on voltage, less so on current and pretty awful on resistance) those cells aren't going to last long. And if fully depleted, could get to a state where they become dangerous to charge.

A lithium ion charger should NEVER charge cells above 4.25V and preferably 4.2V.

I know there are exceptions to this, but not with cells intended for vaping. The way it is supposed to be done is that the cells are charged at constant current till the cell hits 4.2V, then the voltage is held constant till the current has declined to 10% of the original value.

TVF tested battery info to be found here

http://www.preventsuicideapp.com

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14-05-2016 11:28 AM
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stev32k Offline
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RE: These batteries any good?
The charger has no name that I can read just Chinese characters.  If does say 3.7v/500 mA.  So are you saying the charger needs to be replaced or the batteries or both?  Why do you say the battery specs are fictitious?
(This post was last modified: 14-05-2016 11:49 AM by stev32k.)
14-05-2016 11:43 AM
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Don Offline
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RE: These batteries any good?
Charger. The cells will take an occasional foray above 4.2V but making a habit of it will drastically shorten their cycle life.

TVF tested battery info to be found here

http://www.preventsuicideapp.com

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14-05-2016 11:46 AM
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stev32k Offline
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Post: #6
RE: These batteries any good?
(14-05-2016 11:46 AM)Don Wrote:  Charger. The cells will take an occasional foray above 4.2V but making a habit of it will drastically shorten their cycle life.
Do you have a recommendation for a good charger?
14-05-2016 11:50 AM
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Don Offline
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RE: These batteries any good?
Basically pretty much anything from Xtar. Opus C3100 is good but overkill for most folks. The LiitoKala chargers review well too. I'd not buy anything that hadn't been reviewed as good by HKJ. His reviews are to be found here.

I'd look around for a charger that you can get for a decent price then check his reviews.

TVF tested battery info to be found here

http://www.preventsuicideapp.com

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14-05-2016 11:55 AM
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stev32k (05-14-2016)
stev32k Offline
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Post: #8
RE: These batteries any good?
I just ordered this xtar vp2 http://www.amazon.com/XTAR-VP2-Selectabl...r+charger  It was rated very good.

Thanks for the help.
14-05-2016 01:07 PM
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Post: #9
RE: These batteries any good?
I've got a pair of IMREN batteries, and they've been serving me quite well.  The specs on them are always inflated, they aren't 3200 mah and they sure as hell aren't 40 A peak - no 18650 is.  It's normal for a 3.7v battery to hit 4.2 when fully charged, and dip to 3.2 when fully drained.

Off topic but kinda on topic - I am unimpressed witht eh new Sigelei branded batteries.  Bought a pair because I was caught off gaurd with no spares and the shop had them on sale.  I get fully 30% less life outta them than any of my others, which include AWT's, VTC4's, LG browns, LG reds, IMREN, and Brillipower. 

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14-05-2016 07:58 PM
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