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#1 (permalink)      9/16/2014 12:01:05 PM US Central   quote/reply + tips
vXplorer
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Very reliable and easy to use!
The D2, displays lots of info in every step of the charging process (compare to i4 I've been using) and in the day or so that I've had the chance to use it (testing it with all kinds of battery sizes and types), I can say that I love it!!

The display is bright, clear and easy to read. Just slip-in the battery and let it do its magic...

One thing I've noticed, is that even though is indicating 4.20V when the battery is fully charged, the actual charge is at 4.16V-4.17V, when measured with a multimeter. If i just take off it's slot, a fully charged battery and just slide it back on it, even the D2, show the charge at 4.16-4.17V.

The i4, charges all the way to 4.20-4.21V, before cut off and it is actually 4.20-4.21V when measured. I'm no battery expert, but I believe that not charging to the max (4.2V) will extend battery cycle life as much as 2X from what the "experts" say!!
#2 (permalink)      9/16/2014 1:28:51 PM US Central   quote/reply + tips
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iggys
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I have noticed it charges different batteries at different rates and peaks.. Some will charge all the way to 4.2v while others are 4.18ish Volts.. The D2 will charge some batteries at less than 500mAh or half amp..
Some of it I believe is the type of battery chemistry limiting the charge rate and the health of the battery it's self.. I'm sure someone on FT forums is a charging wonk and knows how that works.. Doubling the life of your batteries would more than pay for the D2 over a years worth of use so I hope that's true.. My i4 hardly ever gets used now..

Edited on 9/16/2014 at 1:44 PM. Reason:
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#3 (permalink)      9/16/2014 1:42:56 PM US Central   quote/reply + tips
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joaopra
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My i2 charges until around 4.17V depending on the battery or at least that is what my lame multimeter reads.
Using "regulation" as poorly disguised prohibition is criminal. Vaping is not smoking, reduces harm and saves lives.
#4 (permalink)      9/17/2014 8:11:16 AM US Central   quote/reply + tips
vXplorer
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iggys wrote:

I have noticed it charges different batteries at different rates and peaks.. Some will charge all the way to 4.2v while others are 4.18ish Volts.. The D2 will charge some batteries at less than 500mAh or half amp.. Some of it I believe is the type of battery chemistry limiting the charge rate and the health of the battery it's self.. I'm sure someone on FT forums is a charging wonk and knows how that works.. Doubling the life of your batteries would more than pay for the D2 over a years worth of use so I hope that's true.. My i4 hardly ever gets used now..



I noticed that when the charge gets close to full, then the D2 mA starts fluctuating (below or above 500 mA), until it reaches full charge (4.16-4.17V). And that's constant behavior at least with all 18xxx batteries.

joaopra wrote:

My i2 charges until around 4.17V depending on the battery or at least that is what my lame multimeter reads.



I2? If you mean D2, then that's my experience too...


Edited on 9/17/2014 at 8:13 AM. Reason:
#5 (permalink)      9/17/2014 9:54:46 AM US Central   quote/reply + tips
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joaopra
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I2 Yes - SKU 1811800
Using "regulation" as poorly disguised prohibition is criminal. Vaping is not smoking, reduces harm and saves lives.
#6 (permalink)      9/17/2014 11:04:57 AM US Central   quote/reply + tips
monsteramp
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same, i slot back a "full charged" battery and it reads 4.1Xv and continues charging. i thought something was wrong with my batt or charger...

anyway its still good, only wished i had gotten the 4 slot one cuz now my collection is growing.
#7 (permalink)      9/17/2014 6:04:12 PM US Central   quote/reply + tips
vXplorer
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joaopra wrote:

I2 Yes - SKU 1811800



I have the i4, been using it for almost a year now, with same 4 batteries (rotation) and it's been fully charging them to 4.20V (confirmed with multimeter). I fully charged 2 of the same batteries on my new D2, measured (with multimeter) them at 4.17V, then put them on my i4 and it charged them all the way up to 4.20V.

So, if you say that your i2, charges up to 4.17V, then it may be something with the 2 slot battery Nitecore and not necessarily a feature of the new D2... ?