li po test

[rolf]

just testing how long a 900 ma li po single cell would last ...found them on e bay and could not resist ...they are 900 ma 7.4 v (2 cells ) very carefull separated them . cut 2 pieces of plastic from a cake box to cover them and scotch taped to protect the cell...since this is only for testing nothing is glued in . the switch is backed up with a small fiberglass shell . so if I want to reuse it it is easy to take out without damaging it.. oops forgot the charger but found a place and wired it in .. the board is the 4 botton from madvapes. vaped 2 tanks and cant get over how well it works . had to set the voltage down a bit. vape time is about 4 hrs. next two cells in parallel ??and thanks retird for all the help with the program modes... just having fun !

 

[retird]

Good to see ya got it going your way....

There are many choices for batteries......these are out of stock right now, but I like these....

5x E-FLY Model 1200mah 3.7v 25C LiPo Li-Polymer Lithium Polymer Battery CA218 :: Battery :: RCECHO

 

[dr g]

Lipos are great batteries for ecigs in every way except safety.
Also there are a few hard cell makers that are advancing the technology to interesting places.

 

[rolf]

yes I agree but that's why I put a pt fuse in it .even just to try it out .at least there are no battery springs . at about halv an ohm like on my ni mh pack of 4 . which I am rebuilding now .happy vaping rolf

 

[dr g]

physical damage is the concern, plus the lack of "safe" chemistry options, fuses apply to all unregulated batteries

 

[retird]

fuses are a great things to use but will not stop a run away battery...should any battery go south the fuse will not stop it....any Li-?? battery that goes south can cause fire etc....when the Lithium meets oxygen.....it is not just Li-po's that can go south....any battery is subject to damage also....being carefull is the key.........I have yet to see any e-cig fire using a single li-po where the battery was not damaged first by some cause prior to the venting....have seen pictures of e-cigs venting and on fire that were not using li-po's and actually exploded and caused severe facial damage....so the key is being careful.....just a thought rolf.....(I've used li-po's for almost 3 years without a single hick-up and have 5 mods using them) Only thing is I've replaced a few that got worn down from use..... one mod uses 2 li-po's in parallel (a Darwin)...if you are concerned about Li-Po's just avoid them....it's that easy.....

There are many modders that take a multi-cell pack and disect them to use in mods.....I personally never do that... but that's just me.....I won't chance unseen damage from taking them apart.....I just buy single cell batteries with leads already attached.....

yes I agree but that's why I put a pt fuse in it .even just to try it out .at least there are no battery springs . at about halv an ohm like on my ni mh pack of 4 . which I am rebuilding now .happy vaping rolf

 

[rolf]

yes I agree on fuses what they protect and what not . a short is different story than a runaway battery , it is the battery spring used as a fuse is what I don't believe in .never used a li po before sure found out in a hurry how delicate they are ...jep...
the other one I will not take apart I will rewire it in parallel for 1800 ma. not so easy either!! there are 3 black and two red wire to figure out . the next time I will defenetly buy cingle cells. amazing how much batteries advanced over many years. when I grew up in Germany during the warwe used the carbon center post connected to a ac transformer for soldering . later it was nicads including wet cell ones when charging we had to watch the voltage constantly even with a current limiting resistor . also lead acid . the new batteries are a totally new ballgame. the current they can draw ...whauiiii

 

[retird]

ugh......noon news here showed an ego style battery that caught fire and self propelled...hit a wall and landed on the carpet and exploded....caught the carpet on fire in 3 places....They interviewed a B&M owner and he said that possibly the user was using the wrong charger or possibly the e-cig was left in a hot car for a prolonged time....the user said the B&M store where she purchased it said she could use any charger....????

http://kfor.com/2013/08/01/e-cigarette-explodes-and-sparks-small-fire/


Not good for e-cig publicity......

just reminds us to be carefully.....with any type battery.....

http://batteryuniversity.com/learn/

 

[rolf]

hi retird !
whou that is not so cool . no I am not afreigt of li po . I just treat them with respect . double and triple check everything. starting with the charger checked the charging voltage ...the voltage when it cuts off .and battery voltage when fully charged . and now the onboard charger ..same thing ....even if they are automatic I want to know if all is within specs.. repackaging in something harder to cover no biggi either ...chemistry within its limits ok ...o well sort of!..still totally agree to buy single cells next time.
the double cell in series I will rewire without taking them apart . I think I am going to wire a small maybe 12 v light bulb to probe in conjunction with the meter to make sure connect it right .sure like to know what charger was used on the bazooka !!!rolf

 

[retird]

sure like to know what charger was used on the bazooka !!!rolf .....

I wonder if there is more to the story than we see.....from the looks of the ego battery case it looks like it heated right at the switch....at least it looks like case damage at that point...(stop the video at 1:54 and look at the damage).....

 

[rolf]

hi retird
I gess we have to wait until someone will look into it more . im sure we will hear more details about it .
to me it looks like the charger is the wrong version . any short would fryed the board first or the fine wires would have melted .I don't think there is a fuse in that battery which would opened up . that is in normal use ...to me it looks like the charge was at fault and in that case the fuse or something would not help !! also no vent hole !! the least resistance for the gases was to the switch hole ...well we will find out I am sure...dreaming of bazookas ..ha ha rolf

 

[cmacclel]

That video made no sense. They showed the battery 100% intact sitting next to something that was charred. I have fixed many Ego battery's for the local vape shop and they all use single cells.

 

[mezzio]

I've been looking at some of the LiPo's I have sitting around wondering how I could use them in a mod.

Draining a LiPo too low can be dangerous, overcharging them can also be dangerous... luckily the technology exists to greatly reduce the danger one might face when using LiPo batteries.

I was browsing hobbywing and found a 1S 1500mAh 30C LiPo for about $2, the same company also sells speed controllers which have built in low voltage detection. My thinking is buy one of those cheap ESC's and using that as the starting point of the mod. With some ESC's you should be able to take the LVD out and wire it in to the mod, then no matter how you use it, it will shut off when the voltage drops too low... some ESC's also have heat protection when would shut it off if it gets too hot.

I really started contemplating LiPo usage after I read several threads of people afraid of their batteries not being able to handle super low resistance atomizers and stuff due to the discharge rates on the batteries. Liposuction used for RC applications advertise that discharge rate on the pack, so its one less worry... finding a specific battery which has the correct voltage mAh and discharge rate you seek is another story, lol.




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[rolf]

hi mezzio
you are right li po s need a little more care ...as you said charging and discharging . I would not use them without the electronics ,which will stop vaping on a low battery used a charger board which cuts off when fully charged .
also used a fuse. not familiar with the unit from hobby world ...sound interesting .
just got 2 1200 ma batterys from hobby king for my next mod . have funn and be safe.

 

[BJ43]

I've been looking at some of the LiPo's I have sitting around wondering how I could use them in a mod.

Draining a LiPo too low can be dangerous, overcharging them can also be dangerous... luckily the technology exists to greatly reduce the danger one might face when using LiPo batteries.

I was browsing hobbywing and found a 1S 1500mAh 30C LiPo for about $2, the same company also sells speed controllers which have built in low voltage detection. My thinking is buy one of those cheap ESC's and using that as the starting point of the mod. With some ESC's you should be able to take the LVD out and wire it in to the mod, then no matter how you use it, it will shut off when the voltage drops too low... some ESC's also have heat protection when would shut it off if it gets too hot.

I really started contemplating LiPo usage after I read several threads of people afraid of their batteries not being able to handle super low resistance atomizers and stuff due to the discharge rates on the batteries. Liposuction used for RC applications advertise that discharge rate on the pack, so its one less worry... finding a specific battery which has the correct voltage mAh and discharge rate you seek is another story, lol.




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Cheaper than an ECS.
Protection Circuit Module PCB for 3 7V Li Polymer Battery 14A Cut Off | eBay

 

[rolf]

thanks bj43 !
nice info to use on some mods I have in mind ...while looking it up I runn across some silver conductive paint for 5.99 free shipping.
have funn....rolf

 

[Rocketman]

to me it looks like the charger is the wrong version .

To me it looks like the 'charger' from a $10 gas station disposable.
Not much room inside that 'charger' for a circuit board.
Most have nothing but 2 wires inside them. The 'smarts' for these are in the disposable e-cig.
Anyone that has a disposable 'charger' lying around is asking for a fire.
The early eGos and clones did not have an overcharge cutoff. They relied on a true charger with built in smarts.

Put the two together and you have a problem.

 

[mezzio]

Cheaper than an ECS.
Protection Circuit Module PCB for 3 7V Li Polymer Battery 14A Cut Off | eBay

Right after I wrote that I went searching and found plans for a low voltage detection circuit that could be built for about $1.20, lol. I just didn't update my reply

All of my ESC's in my trucks and cars have built in LVD, so I've never had to look them up, its nice seeing that the circuit is available for only a couple bucks.






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