alvoram
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Post by alvoram on Dec 6, 2012 13:42:47 GMT
If the whole country switched from Tobacco to e-cigs tomorrow the country would be in trouble with the lost revenue. Not that it's ever going to happen, but each vaper costs the UK government money in lost revenue... they don't like that and are unlikely to stand for it when they notice enough people doing it (i.E They lose an appreciable amount of revenue.) I was under the impression that smokers cost the tax payer more than they give in by paying tobacco duty, they are a massive drain on the NHS. |
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alvoram
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Post by alvoram on Dec 6, 2012 13:26:56 GMT
Xtar WP2 charger owners: If the plug/power supply of the charger ever dies on you, don't panic, some netgear router power supplies are also 12v / 1A with DC centre pole positive). I found that out the hard way yesterday. Good advice. You can also buy universal ones to that spec. I have literally 10's of them, all different outputs and connectors, stuffed away in a box though. Pretty sure I'll have one or two in there  |
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alvoram
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Post by alvoram on Dec 6, 2012 9:01:11 GMT
"Ban all nicotine containing products that have not been approved as a medicine"
This includes cigarette then?
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alvoram
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Post by alvoram on Dec 6, 2012 8:54:11 GMT
The asus transformer pads are fantastic devices, especially suited to those who aren't sure if they want a table or netbook, as it's both. I'm also a google nexus fan though, and a little bit of an apple hater :/ it has to be said.
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alvoram
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Post by alvoram on Dec 6, 2012 0:45:46 GMT
They were advertising for xmas temps on evening shifts in my area, wasn't sure if it was to put in an extra round in the evening or what, guess now I know why.
On another not, I'd planned for vendors being off over xmas etc, but what this thread has made me realise is that if we have more bad whether and long periods of no post, like in previous years, I could be in trouble, need to stock up more I think. thanks.
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alvoram
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Post by alvoram on Dec 5, 2012 18:37:07 GMT
But are they not measured and rated to take into consideration that they shouldn't be used below 2.75? If not then that is a bit misleading IMO. Yes..I did not explain that very well.. But once they go below 3.2-3.3 volts they hardly give out any energy and plummet to 2.75 volts..This energy discharge graph at 0.2 amps (200 mA) shows how they start dipping at the beginning and the end.  What I am trying to get through is you cannot take a battery capacity or voltage and work out the time it is going to last for a given load the way you are doing it by simple multiplication and division. The energy it gives out is not proportional through it's discharge curve at safe voltages. At 4.2 volts the plummet is quite quick and then it stabilizes at around 4.0 volts and then again starts to plummet at around 3.3 volts and then undervolt if it is not protected. The capacity is calculated from 4.2 to 2.75 but the battery becomes almost unusable ie., flat below 3.3 volts..Any load and the voltage will just plummet without much energy being given out.. Thanks macca for taking the time to try and explain, I had seen charts like this before, and that's kind of what I was getting at, that the batteries had almost reached their tested usable capacities before they dropped off. Take the tenergy 2600 as an example (the easiest for me to read) that has a capacity of what looks to be 7800 mWh to 7900mWh up to the point it drops to 3.2 Volts. So based on your calculations from your previous post, at 0.15 mA consumption, the highest consumption in terms of wattage would be when the battery was fully charged, at 4.2 x 0.15 = 0.63 mW.... with that consumption dropping down as the battery drops in voltage, your sum was 3 x 0.15=0.45 mW.... so ignoring the curve, or put simpler, ignoring the fact that the consumption drops as the battery loses charge, and calculating it based on the highest consumption, should yield a result, in hours, that is less than the true length of time, in hours, it would take the battery to discharge at o.15mA. Based on this, when I calculate that 7800mW / 0.63mW (the highest consumption remember) and I get 12,380 hours, the actual result if I factored in the reduction in consumption as the voltage drops, and followed the curve, should actually be more hours than that. See that is why I am confused, not because of the curve, but because you said that the reduction in consumption in terms of mW as the battery voltage drops, (0.63mW at 4.2V as opposed to 0.45 at 3V) would mean the amount of hours we'd get from a 7'800mWh battery at 0.15mA would be less than the figure I got from calculating at 0.63mW, when simple maths suggests it would actually be more. Put even simpler I'm struggling to see how a gradual decline from 0.63mW to 0.45mW demand on a battery would lead to the battery lasting less time than if there was a constant 0.63mW demand on it. ??? ??? ??? |
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alvoram
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Post by alvoram on Dec 5, 2012 1:12:20 GMT
Wow green, very exciting, good luck, and keep calm, everything will be fine, but you should know that by your third, haha Keep us updated  |
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Post by alvoram on Dec 4, 2012 23:14:09 GMT
Li-Ion batteries have a very low self discharge rate.. Once it goes below the safe voltage of 2.75 volts the battery will self discharge at a very high rate due to undervolting so no it won't last 10,000 hours or whatever. But are they not measured and rated to take into consideration that they shouldn't be used below 2.75? If not then that is a bit misleading IMO. |
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alvoram
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Post by alvoram on Dec 4, 2012 17:55:53 GMT
The current consumed when idle is called quiescent current which in the case of a Vamo has been calculated at 0.15 mA. So the time it takes for the battery to go flat depends on the charge state of the battery. If you put a freshly charged battery in it will be consuming 4.2 x 0.15 = 0.63 mWh at the beginning and at 3 volts it will be draining the battery at 3 x 0.15=0.45 mWh. It's not a straight forward calculation and you need to calculate the area under the graph which can be done by knowing the slope of the decline. So you would still get over 10'000 hours out of a fully charged 2000mah battery on idle? Without knowing the slope, and taking into consideration the decline in consumption as the voltage drops 7400 mWh / 0.63 = 11'746 hours, And that figure would be higher if you calculated the decline in consumption too. Is that right? If it is I'm still surprised by this, I thought they would discharge on their own faster then that, never mind in a mod. |
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alvoram
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Post by alvoram on Dec 4, 2012 17:45:14 GMT
NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOo ooooooooooooooooooooooooooooo NOOOOOOOOOOOOOO lol No apple pie and custard, I hope you get some in before you remove this offer  |
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alvoram
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Post by alvoram on Dec 4, 2012 17:11:04 GMT
So (disregarding the fact that battery capacities are rarely accurate, and there are other small factors in play such as such a small current draw as opposed to the 1amp that the capacity is apparently often tested at) if a battery was 1500mah, a battery would have to be in the vamo for 10'000 hours to go from fully charged to completely flat? Not bad really  This is interesting, you learn something new every day, unfortunately for me, I also forget 2 things, daily, that I'd previously learnt!!!  |
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Post by alvoram on Dec 4, 2012 3:48:08 GMT
All devices with electronics have a small amount of idle consumption. The Zmax V2 idle consumption has been tested at 0.11 mA, the Vamo is 0.15 mA, the YJ LT 0.16 mA and the Provari 0.96 mA. Better to remove the batteries if the unit is to be left untouched for extended lengths of time. so does that mean that over ten hours the vamo should consume 1.5mah of the batteries 2000mah(est?) Or around about that figure, because it sounds like it's using a lot more than that. |
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Post by alvoram on Dec 2, 2012 2:19:57 GMT
I've run out of juice, had dead batteries and even forgotten to take one out with me at all, but it hasnt been the end of the world. I honestly don't think I'm addicted to vaping nearly as much as I was to smoking, and after a year off the ciggies, I can go full days without nicotine. It isn't exactly easy, and Id rather have a vape with me, but I don't start thinking about hunting down a disposable ecig vendor or anything like that, just count down the hours until I can get to my kit I think I could quit vaping any time I wanted to now, it's more of a hobby than an addiction, though without actually trying, I cant say that with any certainty, and I don't intend to try any time soon. |
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Post by alvoram on Dec 2, 2012 2:08:41 GMT
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alvoram
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Post by alvoram on Dec 1, 2012 18:03:32 GMT
Personally I like the look of the cube, but cant afford one right now as I have bought too much already in the last month or so, so no idea how good they actually are. There is an 18650+ version that is big enough to fit the battery and the kick, although I'm not sure who has these in stock.... Safercigs has the version 2, or the hex mod as it's better known, which doesn't look nearly as good IMO, but its only £84ish www.safercigs.co.uk/V2_CUBE__HEX_18650/p705283_5708212.aspxDont know why I've just written this, as I have never tried them, so can't vouch for them or anything, if I was you, Id take the advice of those that have. But IMO this mod is the best looking (ver 1, the cube, not the hex) |
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