Fogstar drift batteries

merl said:
Bahh, don't beat yourself up about it. LFP is dropping in price continually and it's just a matter of time before they (or their equivalent) is selling for £799, a bit more time and it'll be £699! Just buy em, fit be em and enjoy em, no use waiting for the price to bottom because goodness knows when that'll happen, probably £1 per Ah? Guesses anyone?
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Or before that happens something else will come out and the circle starts all over again, as usually happens with electronics.
 
Fazerloz said:
Or before that happens something else will come out and the circle starts all over again, as usually happens with electronics.
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Hopefully 🤞🤞🤞. We've waited an awfully long time for something to replace lead acid but if what were witnessing with lithium is just the start of a forthcoming battery tech boom ( not literally!) then I say bring it on. A battery with the same energy density as petrol would be approximately a 50 fold improvement over what's currently available.
Did you know that a fully charged 100Ah lithium battery contains the same energy as 5 tea lights ☹️
 
merl said:
Hopefully 🤞🤞🤞. We've waited an awfully long time for something to replace lead acid but if what were witnessing with lithium is just the start of a forthcoming battery tech boom ( not literally!) then I say bring it on. A battery with the same energy density as petrol would be approximately a 50 fold improvement over what's currently available.
Did you know that a fully charged 100Ah lithium battery contains the same energy as 5 tea lights ☹️
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I don't know if some of your posts are meant to be joking or serious, but the last point? don't be so daft!
 
merl said:
Hopefully 🤞🤞🤞. We've waited an awfully long time for something to replace lead acid but if what were witnessing with lithium is just the start of a forthcoming battery tech boom ( not literally!) then I say bring it on. A battery with the same energy density as petrol would be approximately a 50 fold improvement over what's currently available.
Did you know that a fully charged 100Ah lithium battery contains the same energy as 5 tea lights ☹️
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I don't care what they bring out now Merl. The Lithium should give me everything I require and should outlast my motorhoming days. At the moment though I'm trying to decide whether to buy just one more 300ah Lithium or two.

Buying any newer technology in the forseeable future would be pointless for me.
 
wildebus said:
I don't know if some of your posts are meant to be joking or serious, but the last point? don't be so daft!
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Looking at Amazon, I see that tea candles are a wax cylinder about 1.5 inches in diameter and * 0.5 inches tall. Volume of a cylinder is pi * r**2 * h = 0.883 cubic inches or 14.45 cm**3. The density of paraffin wax is 0.9 g/cm**3, so we're looking at 13.03 grams of wax. The energy content of paraffin is about 42 kJ/g, so we're looking at 547kJ. There are 0.277 watt-hours per kJ, so we've got about 152 watt hours/ tealight or about 8/battery. So you're correct, it's 5 for lead acid if you're taking them down to about 35% and a whopping 8 for a fully charged lifepo4.



References:
Wiki I think 👍
energy content of paraffin: Energy Content of Fuels
tea candles: Amazon.com: Tealight Candles White Unscented Set of 125: Furniture & Decor
density of paraffin wax: Paraffin.
 
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merl said:
Looking at Amazon, I see that tea candles are a wax cylinder about 1.5 inches in diameter and * 0.5 inches tall. Volume of a cylinder is pi * r**2 * h = 0.883 cubic inches or 14.45 cm**3. The density of paraffin wax is 0.9 g/cm**3, so we're looking at 13.03 grams of wax. The energy content of paraffin is about 42 kJ/g, so we're looking at 547kJ. There are 0.277 watt-hours per kJ, so we've got about 152 watt hours/ tealight or about 8/battery. So you're correct, it's 5 for lead acid if you're taking them down to about 35% and 8 for a fully charged lifepo4.



References:
Wiki I think 👍
energy content of paraffin: Energy Content of Fuels
tea candles: Amazon.com: Tealight Candles White Unscented Set of 125: Furniture & Decor
density of paraffin wax: Paraffin.
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If I change over to tea candles can I still use my existing charger and solar setup to replenish them? :ROFLMAO:

Regards,
Del
 
merl said:
Looking at Amazon, I see that tea candles are a wax cylinder about 1.5 inches in diameter and * 0.5 inches tall. Volume of a cylinder is pi * r**2 * h = 0.883 cubic inches or 14.45 cm**3. The density of paraffin wax is 0.9 g/cm**3, so we're looking at 13.03 grams of wax. The energy content of paraffin is about 42 kJ/g, so we're looking at 547kJ. There are 0.277 watt-hours per kJ, so we've got about 152 watt hours/ tealight or about 8/battery. So you're correct, it's 5 for lead acid if you're taking them down to about 35% and a whopping 8 for a fully charged lifepo4.



References:
Wiki I think 👍
energy content of paraffin: Energy Content of Fuels
tea candles: Amazon.com: Tealight Candles White Unscented Set of 125: Furniture & Decor
density of paraffin wax: Paraffin.
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I think you need to redo your maths again. A tea light has not got 152Wh of energy in them. maybe a third that for good ones,
 
wildebus said:
I think you need to redo your maths again. A tea light has not got 152Wh of energy in them. maybe a third that for good ones,
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It's not my maths, as per the post I think it came from wiki but It was back in the lead acid days and my memory doesn't go back that far.
Lots of different figures for the wattage of a tealight flame on the net but 30-40 watts seems average, couple this to a 6 hour burn time (seems reasonable, amazon claim longer than that for theirs) and you get 210 Wh for a 35W flame. So that's actually only 6 tealights per battery. Using Fazerlots approximation of 60W (6 hour burn) you only get 3.4 tealights.
I think your confusing Watts with Watt hours maybe?
 
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merl said:
It's not my maths, as per the post I think it came from wiki but It was back in the lead acid days and my memory doesn't go back that far.
Lots of different figures for the wattage of a tealight flame on the net but 30-40 watts seems average, couple this to a 6 hour burn time (seems reasonable, amazon claim longer than that for theirs) and you get 210 Wh for a 35W flame. So that's actually only 6 tealights per battery. Using Fazerlots approximation of 60W (6 hour burn) you only get 3.4 tealights.
I think your confusing Watts with Watt hours maybe?
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no confusion here :)
so you think 5 tealights have more total power as a 1000KW electric fire on for an hour? one tea light puts out same light than a 40W incandescent light bulb?
Amazon have tealights for 6p each. that would add up to less than 30p per kWh. Cheaper than mains electricity!

Sorry, you found a post on the internet? well, there you go, it must be a fact ;)
 
A tea light produces less than one lumen.

A 40w bulb produces 450 lumens.

Don’t fancy heating my home with tea lights, but I love watching folk getting incandescent over wattage, so watt are we debating about. :)
 
wildebus said:
so you think 5 tealights have more total power as a 1000KW electric fire on for an hour
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Assuming the 1000KW is a typo and you meant 1KW?
Yes, because the tealights are running for 7 hours not 1 hour.
(Watt hours = Watts X hours) .
5 tealights @ 35W each will have an output of 175W, now that's pretty low and wouldn't do much as an electric fire but that 175W is per hour, over the 7 hour period they'll produce 175X7=1225 Wh Which as you know is very nearly a battery full.
wildebus said:
Sorry, you found a post on the internet? well, there you go, it must be a fact
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The guy produced a calculation of energy contained in a tealight based on dimensions (the amount of fuel) and calorific value of paraffin(the fuel) which he posted on the internet to answer the question "How many Wh in a tealight" I can only go by the information available and what seems right but looking a little further tonight then comparably that figure actually looks like it might actually be low . Out of interest where did you get your figures from? ("A tea light has not got 152Wh of energy in them. maybe a third that for good ones,")
wildebus said:
one tea light puts out same light than a 40W incandescent light bulb?
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You cant make a judgement about Wattage by considering only the lumens produced, My soldering iron doesn't put out ANY lumens at all but it definitely consumes 40W and will as near as damn it emit 40W in heat.
Virtually ALL of the energy consumed by an incandescent lamp is emitted as heat(over 95%), much the same goes for a candle. So rather than comparing the lumens produced by the candle and the lamp you should be comparing the heat produced by both. So a 40W lamp in an enclosed biscuit tin VS a tea light?
FWIW I'd sooner hold my hand a couple of inches above my iron than a tealight flame too, neither of these 2 comparisons are at all scientific but indicates that the flame is probably on par with or not far behind the iron or the bulb in wattage.
 
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This whole conversation is daft and irrelevant to any reality. what you are also forgetting to consider is energy efficiency. the energy stored in a battery will be used with a near 100% conversion. This is why for example an electric induction hob is so much more efficient that say a gas hob in terms of energy consumed to achieve the same result. You need to factor that in your " a 100Ah Lithium Battery contains x number of tea lights" discussion.
Anyway, I'm bored with this and have better things to do so I'm checking out :)
 
wildebus said:
This whole conversation is daft and irrelevant to any reality. what you are also forgetting to consider is energy efficiency. the energy stored in a battery will be used with a near 100% conversion. This is why for example an electric induction hob is so much more efficient that say a gas hob in terms of energy consumed to achieve the same result. You need to factor that in your " a 100Ah Lithium Battery contains x number of tea lights" discussion.
Anyway, I'm bored with this and have better things to do so I'm checking out :)
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:ROFLMAO:
Christ I hope you didn't go to Uni for that sort of Physics knowledge, if you did you need to apply for a refund🤭🤭
I'm gonna call Scottish power up tomorrow and demand a refund on me gas bill cos a KWh of gas it doesn't contain a 'real' KWh, I mean it cant do cos it don't boil my kettle as quick 🤪

A Watt is a Watt, it's a standard unit of power.
An hour is an hour, it's a standard unit of time.
A watt hour is a watt hour, it's standard unit of energy.
You get your gas bill measured in Kwh,
You get your electric bill measured in the same.
A Kwh of gas has exactly the same energy as a KWh of electricity, you dont need to factor in energy efficiency as you say because they both contain the same amount of energy....1KWh or 3600 Kilo joules.
The reason why it takes a lot more energy to get the same amount of water to boil from gas/oil or paraffin flame isn't because the fuel is less efficient it's because the apparatus (kettle etc) is less efficient at getting the energy to it's desired destination ie the water. If put 100Wh of electrical energy into water via an induction hob virtually most goes into the water. If you put 100WH of energy into a gas hob kettle a lot of the energy misses the kettle and goes into warming the air instead but the energy emitted by both sources remain the same...100WH. It's simply heated up different things.

Anyway, I'm bored with this and have better things to do so I'm checking out
Good idea, when you're in a hole best stop digging. ;);)
🤗🤗
 
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