Hacksaw meets the Screwdriver

[Kent C]

hahahahahahaha and at this point, the Americans must think we've finally gone completely loopy

A bit daft perhaps, but not for the ones that can use google

BLUE PETER BBC CHILDRENS TELEVISION HISTORY THE BLUEBIRD ELECTRIC LAND SPEED RECORD PROJECT

Looks like fun to me..... let's see, I need an ecig holder ;-)

 

[trog100]

Hes just proved there is No PCB protection circuit in This PV. This is a battery box just like most PVs that cost 100+. A battery box is a battery box.

has he.. the pcb board acts like a fuse and fails in the event of a direct battery short circuit.. so its there for a reason and serves its purpose as a short circuit protection device..

a battery box is a box you put batteries in..

trog

ps... to clarify (for those who care) this thread subject goes back to a conversation between me and crash that happened some weeks back..

it was about devices that used the fact they had no wires as a plus point... crash seems to put some value to this.. he must do else he would not mention it...

i just happened to point out there might be some downside he had not thought of to having solid metal devices with no wires or circuit boards..

this thread should have pointed out and made clear this downside..

 

[Crash]

has he.. the pcb board acts like a fuse and fails in the event of a direct battery short circuit.. so its there for a reason and serves its purpose as a short circuit protection device..

a battery box is a box you put batteries in..

trog

ps... to clarify (for those who care) this thread subject goes back to a conversation between me and crash that happened some weeks back..

it was about devices that used the fact they had no wires as a plus point... crash seems to put some value to this.. he must do else he would not mention it...

i just happened to point out there might be some downside he had not thought of to having solid metal devices with no wires or circuit boards..

this thread should have pointed out and made clear this downside..

eeeeek you lost me there trog, are you trying to say that i prefer no wires over wires? if so then yes. I just believe that if I don't see any wires or soldering there is less stuff that could go wrong. And the makers of "mechanical" mods claim, that in case the battery does blow up, they have vent holes for the fumes to escape so no pieces of sharplen or other lil parts will go flying out from the pressure that will be built up from the explosion. I don't know how ture that is, so no one to this date has had a battery expolde, well other then that gg pic that breakfastchef posted, dunno where it is, but maybe he could post it again?? I don't think anyone can make a product that is idiot proof, or crash proof for that matter I tore the SD apart to try and find out how it worked, I posted the pics and you told me what I needed to know, so well I'm satisfied, and might I also add, you have been nothing but respectful in all our communications, and you've always provided excellent customer service when required.

 

[trog100]

no one has had a battery explode..??.. this might be only because there really are not many devices out there yet where this could happen..

most of these bigger battery "mods" have not sold in large enough numbers yet..

we have had reports of exploding batteries in some dual chargers.. this happens when one is put in the correct way round and the other is put in the wrong round... this causes a direct battery short circuit.. i did point this out to you as the reason we sold the charger you thought was sh-t... it really is pretty idiot proof.. (safe) some of the faster dual ones are not..

now we have the no wires thing.. i also pointed out to you what you said in your reviews like it or not did influence what some people buy..

so far this place is pushing folks towards bigger batteries and higher voltages.. not a way we want to go and i am sure we will lose sales because of it..

we have sold up to now probably around 1500 Screwdrivers.. plenty enough to have some idea of what folks do to them and what can happen to them..

we have probably had around 30 or so back for repair with melted springs and burnt out circuit boards.. so we know for certain our weak spot fuse has been called upon to do its business.. ie fail before the directly shorted out battery explodes..

we know for certain current atomizer design does mean some will cause a direct battery short circuit.. see pics and the thread below..

failed atomizers and why.. crushed grommets.. - ECigScrewdriver

what we dont know is what would have happened without the built in "fuse".. we can only guess..

with the new mass produced Mk 11 Screwdriver soon to be sold in what we hope many thousands we have gone to extreme lengths to make them as safe as we can..

but the bottom line is off the shelf larger lithium cells can be dangerous if not treated correctly.. the bigger they are the greater the damage caused if they go bang... will they always be treated correctly... nope.. "idiots" will buy them and "idiots" will use them..

i dont even think lithium technology is safe enough to power the worlds portable things.. but mega bucks ride on it so we have it.. everybody wants little wireless gizmos.. big business earns mega bucks supplying them..


trog

 

[Nuck]

Manufacturers could also go the way PureSmoker went and start using LiFePO4 bats and avoid the explosion and fire issue altogether. It also gives the end user bats that have a rated life of 400% more cycles.

The only downside is the need to use 2 bats (which makes for a larger mod) to achieve a nice voltage for vaping.

 

[AngusATAT]

Manufacturers could also go the way PureSmoker went and start using LiFePO4 bats and avoid the explosion and fire issue altogether. It also gives the end user bats that have a rated life of 400% more cycles.

The only downside is the need to use 2 bats (which makes for a larger mod) to achieve a nice voltage for vaping.

Hmm, thanks for that info. I think two RCR123A rechargeable batteries would fit perfectly in my CHUCK. I'm temporarily using a couple of non-rechargeable CR123A's right now, and really enjoying the 6v vaping. It would be nice to be able to use the LiFePO4 batteries and not have to worry about it blowing up on me.

 

[trog100]

have you ever directly shorted one out to find out what happens nuck..???

i will have to obtain some and see what happens.. i must admit to never having tested them to destruction..

trog

ps... some here but they dont look much use... the capacity is too low..

http://www.dealextreme.com/details.dx/sku.1880

 

[Nuck]

have you ever directly shorted one out to find out what happens nuck..???

i will have to obtain some and see what happens.. i must admit to never having tested them to destruction..

trog

ps... some here but they dont look much use... the capacity is too low..

DealExtreme: $4.50 17340 / CR123A Rechargeable Lithium LiFePO4 Battery 2-Pack (350mAh)

Yeah trog..I have a ton of them and short em frequently while modding. They just get really hot and then stop. They are generally dead once it happens. When I mod with unprotected Li ion bats I'm a hell of a lot more careful

Oh yeah...as you know the mah ratings of the Li ion are full of it. In general I find the LiFePO4 ratings to be much more accurate. Not sure why.

 

[trog100]

Yeah trog..I have a ton of them and short em frequently while modding. They just get really hot and then stop. They are generally dead once it happens. When I mod with unprotected Li ion bats I'm a hell of a lot more careful

Oh yeah...as you know the mah ratings of the Li ion are full of it. In general I find the LiFePO4 ratings to be much more accurate. Not sure why.

if those ones i linked to are accurate.. 350 mah dosnt compare that well to a single 18650 at 2,500 mah which would occupy rough the same volume.. a pair of those in an 18650 sized device like a chuck is gonna have a pretty useless run time.. okay the voltage would be higher but more current would be pumped thru the atomizer the end result being a poor run time for a device as big as a chuck..

it seem to me that size for size li-po has about 1/3 the capacity of li-ion.. which kind of defeats the object of lithium cells in the first place.. which is maximum power packed into a given sized space.. in a baby chuck a single one would have a lousy run time and the voltage would be too low..

i think the only real advantage li-po has going for it is it can be made into any shape to better fit certain things that dont take cylinders very well.. and the fact it lives longer..

trog

ps.. the explode factor is directly linked to the size of li-ion cells i think.. small ones just go flat before enough heat is generated to make them explode... its the big ones that are dangerouse... which is why you wont find many D sized ones..

 

[Nuck]

if those ones i linked to are accurate.. 350 mah dosnt compare that well to a single 18650 at 2,500 mah which would occupy rough the same volume.. a pair of those in an 18650 sized device like a chuck is gonna have a pretty useless run time.. okay the voltage would be higher but more current would be pumped thru the atomizer the end result being a poor run time for a device as big as a chuck..

it seem to me that size for size li-po has about 1/3 the capacity of li-ion.. which kind of defeats the object of lithium cells in the first place.. which is maximum power packed into a given sized space.. in a baby chuck a single one would have a lousy run time and the voltage would be too low..

i think the only real advantage li-po has going for it is it can be made into any shape to better fit certain things that dont take cylinders very well.. and the fact it lives longer..

trog

ps.. the explode factor is directly linked to the size of li-ion cells i think.. small ones just go flat before enough heat is generated to make them explode... its the big ones that are dangerouse... which is why you wont find many D sized ones..

The ones I use are the Tenergy 750 mah. Used in series at high voltage they last a good 4-6 hours of solid vaping. An 18650 usually sits around 2000 mah (real, not advertised) and when used with a dc-dc boost to match the voltage will outlast the tenergy by about 2 to 1.

The reason the LiFePO4 don't explode is due to chemistry and not to capacity. The vastly improved life cycles are as well.

 

[googled]

ps.. the explode factor is directly linked to the size of li-ion cells i think.. small ones just go flat before enough heat is generated to make them explode... its the big ones that are dangerouse... which is why you wont find many D sized ones..

So is it even possible for an AA sized (18650) 2500mah battery to explode, even under short circuit? I've seen demo's on youtube but those seem to be the big RC model type.
Also (I've asked this before elsewhere), is there special regulation that's responsible for the scarcity in the UK of 18650 and 10440's ?

 

[KDinKC]

Crash,

I for one appreciate what you have done and have learned something in the process. Many thanks!

Now where did I put that soldering iron and what kind of monstrosity can I build... lol