Evolv-ing Thread

awsum140

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Hmmmmm, 55 bucks with two 20700 batteries. The name goes on before the quality goes in?

3000mah at 3.7 volts is the same no matter the form factor of the battery and due to higher internal resistance a larger battery may not be capable of high current drain.

I'm was born a cynic.
 

Steamer861

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Hmmmmm, 55 bucks with two 20700 batteries. The name goes on before the quality goes in?

3000mah at 3.7 volts is the same no matter the form factor of the battery and due to higher internal resistance a larger battery may not be capable of high current drain.

I'm was born a cynic.
There's a 4000 mAH one check Mooches review he says 16 amps & 4000 mAH 25% more than an 18650. 16 is a bit low 20 or 25 would be nicer but 16 will do for my style & 25% more life is welcome here :)

The 20700 I have seen are around 10 bucks, not bad really.
IJoy isn't a quality name at all, I have 1 Ijoy atty & build quality is Garbage :(
 

awsum140

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I guess my cynicism comes from wondering if replacing all my devices that are designed around the 18650 for ones designed around the 20700 is worth a 25% increase in time between battery changes.

To me if it isn't built by me and with a dna chipset inside it isn't going to be as good so IJoy is a no go right out of the gate.
 

Steamer861

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This just the start! 20700 will be much improved when everyone starts buying/making them!
Competition drives up quality! I'm certain we will see 5 & 6000 mAH cells in this configuration soon enough!
I would through out my whole collection if & when there are way better cells available :)
Battery life is the worst part of PV's now! Imagine if like phones we could go days on a single charge instead of hours.
 

mikepetro

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This just the start! 20700 will be much improved when everyone starts buying/making them!
Competition drives up quality! I'm certain we will see 5 & 6000 mAH cells in this configuration soon enough!
I would through out my whole collection if & when there are way better cells available :)
Battery life is the worst part of PV's now! Imagine if like phones we could go days on a single charge instead of hours.
I can, on my Lipo mods.

Sent from my SM-T810 using Tapatalk
 

Steamer861

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I can, on my Lipo mods.

I can Not! I have to bring 2 ERM+'s to work with me to make the day :(
I remember back in the day when we all had Motorola Phones & carrying around 2 spare batteries for the whole day coverage. Now my Iphone goes for 3 days some time more!
In a few years PV's will be the same, I hope any way :)
Maybe the 20700 is the start of something better? There not much bigger than an 18650.
 

cigatron

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I guess my cynicism comes from wondering if replacing all my devices that are designed around the 18650 for ones designed around the 20700 is worth a 25% increase in time between battery changes.

To me if it isn't built by me and with a DNA chipset inside it isn't going to be as good so IJoy is a no go right out of the gate.

I'm with you, I have recently invested in a bunch of new Sony 5A 18650 batts so it'll be a while before I buy/build a 20700 mod.
 

awsum140

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Steamer, I don't want to rain on your 20700 parade, but the capacity is limited by the chemistry. If capacities like that were to develop it would also apply to an 18650 and would, probably, require a different chemistry to make those levels.
 

sabre66

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I can Not! I have to bring 2 ERM+'s to work with me to make the day :(
I remember back in the day when we all had Motorola Phones & carrying around 2 spare batteries for the whole day coverage. Now my Iphone goes for 3 days some time more!
In a few years PV's will be the same, I hope any way :)
Maybe the 20700 is the start of something better? There not much bigger than an 18650.
Battery on my iphone sucks but then again I spend alot of time it. I need to carry a charger just to make it through the day.
 

Steamer861

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Battery on my iphone sucks but then again I spend alot of time it. I need to carry a charger just to make it through the day.

I have the + bigger battery :) My son has the smaller one like you, his battery is dead all the time to :(
 

Steamer861

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Steamer, I don't want to rain on your 20700 parade, but the capacity is limited by the chemistry. If capacities like that were to develop it would also apply to an 18650 and would, probably, require a different chemistry to make those levels.

IDK about that! What it really takes is money invested! Some one (Elon) has backed the 20700.
So I'm betting with his $$ there will be improvements in the 20700 before the 18650.
 

cigatron

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Steamer, I don't want to rain on your 20700 parade, but the capacity is limited by the chemistry. If capacities like that were to develop it would also apply to an 18650 and would, probably, require a different chemistry to make those levels.

I agree and size matters with batteries. If the 20700 bat is 25% larger than the 18650 it should store 25% more energy with the same chemistry.
 

Steamer861

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Example! my kid has the new Mac book, it's tiny compared to the old one we replace it for.
The old one may have got 5 hours on the battery, this new one gets 10 hours!
Same chemistry smaller battery twice as long lasting.
If what your saying is true, my kids new Mac book couldn't have happened.
 

cigatron

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Example! my kid has the new Mac book, it's tiny compared to the old one we replace it for.
The old one may have got 5 hours on the battery, this new one gets 10 hours!
Same chemistry smaller battery twice as long lasting.
If what your saying is true, my kids new Mac book couldn't have happened.

Not the same exact chemistry. Could both be the same type of rechargeable but not the same chemistry. Internal chemistry changes can be quite subtle with one variation producing greater mah but less cdc where another variation produces greater cdc with less mah. You're right though, the industry is consumer driven and all types of rechargeables have made great advances in overall energy density in the last couple of years.
 

Steamer861

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Freaking right! I agree a lot of the newer longer lasting power may come from more efficient components but thats not enough! There has to be some improvement in the battery it self :)

Improvements are driven by research & $$, Why has the much bigger 26650 been lagging behind?
No one is invested in battery technology like Elon! Why is He putting the 20700 in his Cars?
 

awsum140

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Example! my kid has the new Mac book, it's tiny compared to the old one we replace it for.
The old one may have got 5 hours on the battery, this new one gets 10 hours!
Same chemistry smaller battery twice as long lasting.
If what your saying is true, my kids new Mac book couldn't have happened.

Steamer, the advances in low current chips and large scale integration, keep in mind we're talking microns here, has reduced the current requirements of more devices than can be imagined. The same battery from the old Mac would probably last a lot longer in the new one. What you're seeing is, probably, a reduction in current draw, reduction in circuit board sizes and a slight increase in battery size. Musk may be behind the 20700, but it's taxpayer money he's spending and, again, unless there is some new "magic" battery chemistry there will be no major capacity improvements from what we see today in the lithium battery arena anyway.

There are numerous other battery chemistries under development and testing that could, possibly, improve safety, lifespan and maybe energy density, but unless and until they prove economically and technically feasible, lithium ion is where it's at. A physically bigger battery, no matter what the chemistry, will have higher capacity than a smaller battery of the same chemistry, simple physics of the situation.
 

SlickWilly

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Interesting, got a new email from Aaron Biebert, maker of A Billion Lives. He spoke at a village meeting in Hartland WI, the village is taking on the FDA from a local level, very cool! Quoted from this Hartland news paper Hartland hearing will question FDA's e-cigarette rules
(This guy Fred Grant is a sharp cookie!)
"Village officials are concerned because Hartland-based e-liquid manufacturer Johnson Creek Enterprises has said the rules could severely limit its business growth.
Speaking during the village board meeting on April 24, attorney Fred Kelly Grant, who is working on behalf of the industry group Electronic Vaping Coalition of America, said this meeting is the start of what could curtail the FDA regulations.
Grant said the FDA is required to coordinate with local governments that will be affected by new regulations. This meeting, he said, will prove the agency has not done that.
“We trust that we're going to be able to show that they haven't done it, and by not doing it, their regulations are illegal,” Grant told the board.
Speakers planned for the meeting include some of the country's "top scientists," Grant said, including a renowned emergency room doctor from Fort Hood, Texas. Many of the speakers will be over the phone or video call.
Grant described the FDA's regulations, which could cost manufacturers up to $1 million for each product application, as illegal and compared them with taxes placed on the colonies that led to the Revolutionary War.
"We've got an executive department of government that over the past 30 years has gone back to what we fought against,” Grant said. “(This is) just our little way of fighting back.”
A former federal prosecutor in Baltimore, Grant moved back to his home state of Idaho several years ago and began practicing law. He said he prides himself on working for the public against those in power. He said that, years ago, he won a case against the developers of a proposed interstate in Texas that would have cut off communities from access to hospitals, increasing commutes to emergency departments by 28 minutes.
He said this case is similar because it threatens the public's access to what the EVCA thinks is a safer alternative to traditional cigarettes. Federal agencies, such as the FDA, hold differing opinions on the safety of e-cigarettes.
"Public health is being hurt by the regulation,” Grant told the board. "Folks, you're going to take them on, and we're going to be there to help you.”
Next week, the EVCA will present its findings to the FDA administrator in Washington."
 
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