Batteries and SAFETY !! please read if you have any doubts or concerns

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spaceballsrules

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Man , do you have a laptop comp. ??? they use Li-ion batts in a much worse configuration , also flashlights and bark collars and !!!

and cell phones, cordless power tools..... etc etc... Some of which have no protection.

Got a cordless drill ??? Li-ion batts Kids !!!

...or how about a CAR!?

Tesla Motors refers to the Roadster's battery pack as the Energy Storage System or ESS. The ESS contains 6,831 lithium ion cells arranged into 11 "sheets" connected in series; each sheet contains 9 "bricks" connected in series; each "brick" contains 69 cells connected in parallel (11S 9S 69P). The cells are of the 18650 form-factor commonly found in laptop batteries.
 

Penner

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I bought an iPro about 3 weeks ago with the recommended batteries & charger on your website, Buzzkill.
Now, I looked up the c rating for those stacked batteries & a battery of the (from your website) recommended type 14430 size FePo4 & it has a c rating of 1.6. Rolygate, has a post on battery safety that, that type of battery(FePo4) should have a c rating of at least 2.0:
http://www.e-cigarette-forum.com/forum/announcements-rules/76078-exploding-mods-current-situation.html

And in 2010 he said a c rating of 4.0.

What I'd like to see on your website, is a shorter iPro mod that takes 1 maybe larger battery that is an AW IMR Lithium Manganese (LiMn) battery with a c rating of at least 4. If that can't be done, I know you could make something smaller with a battery life of 5-6 hours, thats not stacked & safer.

My Provari AW IMR 18490 3.7v 1100 maH battery has a c rating of 8c. With the lighter materials that the iPro is made of & a "blowout" manually (by the user) pressed in bottom cap, this could be a really exclusive mod.

My electrical engineering husband agrees with what I've written.

Thanks for reading.
 
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FeistyAlice

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It's making me rethink the bark collar for my puppy now. I had no idea!

I would think the bark collar doesn't have Lithium chemistry batteries. More than likely they are NiMH and much have less potential for the heating and "exploding" than Lithium chemistry. Check them out to see what batteries they are and the configuration, whether stacked=in series or parallel.

Feisty Alice
 

FeistyAlice

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Mike, thanks for posting this and your devotion to excellence and safety. I stopped stacking batteries months ago, but when I was stacking I used only LiFEPO4, with misguided trust, although I was always careful to keep them marked, switched position, and checked with multimeter before putting on charger and before putting in mods.

Your chip is the only one I will use with stacked batteries and kept in marked sets, 1a/1b, 2a/2b, etc.

It was suggested to me, this past week, that the easiest way to keep the batteries at pretty even voltage, in a stacked situation, during use cycle is to change position, several times, during a use cycle. The easiest way, for sure!!!!

I've been testing all the batteries I have been using, in my Most Beautiful new Silver Buzz Pro, several times during use cycle, when I change the position, and the individual batteries, in a set, during use cycle, are staying very close in voltage, throughout the use cycle. So the situation that can develop, in stacked battery configurations, where one battery becomes more discharged than the other is eliminated.

One doesn't need to do this (meter voltage), this much, especially with Mike's chip, but I'm reporting my results to the VV REOs thread. REO, Robert, is using Mike's chip in his soon to be released VV REOs.

I'm really really really enjoying my new Buzz Pro!!!!!!!!!!!!!!

I'm loving the med "knotty" funky hand blown tank!!!!! To my surprise, DH loves it too, and asked why he doesn't have a fancy "set up" like mine. (I'll have to wait a bit to get another BP as I've wrecked the budget getting neat tanks for BP.)

Feisty Alice
 
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FeistyAlice

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ni-mh mostly these days for everything 14.4v and up. And, that's a welcome change as far as I'm concerned.

I've been using 18v Li-ion battery packs in all my Ryobi cordless tools, for three years now, and I won't go back!! I'm getting several times more use time and pretty constant voltage output throughout the use. My first experience was doing some grinding, using angle grinder, on thick calcium deposits on a gunnite pool. Those deposits were harder than some concrete I have around here. I got almost an hour, each Li-ion battery (they were new), and only a few minutes with the yellow batteries... I forget what those yellow ones are it has been so long since I've used them. And the Li-ion are much lighter. Good for this old granny.

Feisty Alice
 

six

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I've been using 18v Li-ion battery packs in all my Ryobi cordless tools, for three years now, and I won't go back!!

Yeah. Ryobi is using nicad, ni-mh, and li-on. Only thing that bugs me with them is that it is possible to use the wrong charger (if you happen to have more than one ryobi product around and get different batts & chargers). DeWalt has gone to only lion and ni-mh and some of their trade literature indicates they prefer ni-mh (and sell ni-mh at about a 15 to 1 rate depending on country)

I saw a makita li-on blow up on the charger a couple of years ago. It was an impressive explosion (left my ears ringing for a couple of days) and the resulting fire required an extinguisher. So, I welcome the change to ni-mh.
 

BuzzKill

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I bought an iPro about 3 weeks ago with the recommended batteries & charger on your website, Buzzkill.
Now, I looked up the c rating for those stacked batteries & a battery of the (from your website) recommended type 14430 size FePo4 & it has a c rating of 1.6. Rolygate, has a post on battery safety that, that type of battery(FePo4) should have a c rating of at least 2.0:
http://www.e-cigarette-forum.com/forum/announcements-rules/76078-exploding-mods-current-situation.html

And in 2010 he said a c rating of 4.0.

What I'd like to see on your website, is a shorter iPro mod that takes 1 maybe larger battery that is an AW IMR Lithium Manganese (LiMn) battery with a c rating of at least 4. If that can't be done, I know you could make something smaller with a battery life of 5-6 hours, thats not stacked & safer.

My Provari AW IMR 18490 3.7v 1100 maH battery has a c rating of 8c. With the lighter materials that the iPro is made of & a "blowout" manually (by the user) pressed in bottom cap, this could be a really exclusive mod.

My electrical engineering husband agrees with what I've written.

Thanks for reading.


The battery we sell has a 2.5C max discharge rating or 1.62 amps , I understand Roly says these things and the forum is trying to protect itself , in most cases the current draw is around 1.5-2.0 amps , also the max C rating is a 100% duty cycle rating , that means it is a continuous discharge rating , we use these in a 20-30% duty cycle MAX less most times ,. to date we have had NO 14430 battery failures except for DOA ones .

Out devices are very safe , we test the hell out of them and we have 1,000's in the field , I thin kthe record speaks for itself . also with stacked batts the MAH rating of ONE battery is the total MAH available from the set.
 

FeistyAlice

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Yeah. Ryobi is using nicad, ni-mh, and li-on. Only thing that bugs me with them is that it is possible to use the wrong charger (if you happen to have more than one ryobi product around and get different batts & chargers). DeWalt has gone to only lion and ni-mh and some of their trade literature indicates they prefer ni-mh (and sell ni-mh at about a 15 to 1 rate depending on country)

I saw a makita li-on blow up on the charger a couple of years ago. It was an impressive explosion (left my ears ringing for a couple of days) and the resulting fire required an extinguisher. So, I welcome the change to ni-mh.

One safety factor is that my yellow Ryobi batteries won't fit into the Riobi Li-ion charger and vice versa. I just recently threw my last yellow Ryobi battery into the recycle box. So I no longer have any batteries that fit it. Time for that charger to go into the Good Will box. One major drawback to the Ryobi Li-ion is the cost. They cost a fortune. I've gotten rid of all my other cordless power tools that have removable, to charge, battery packs. I had another drill, with battery packs, that are charged on external charger. It's battery and charger were not interchangeable with the yellow Ryobi. It went to Good Will long ago. I guess I have been lucky, although I pay pretty close attention to those type of things. I've been managing a huge army of cleaning 'bots since 2001 so I have some experience under my belt, too. It takes any ARMY of them to manage all my dust, mud, and dog hair.

Feisty Alice
 

FeistyAlice

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BTW... there are a lot of people who have bunches of the low C rated Tenergys and are crying, right now, at the thought of dumping them. I just commented to one, on another thread, that although the chances of "exploding batteries" are extremely remote do you want to be the one in a few hundred thousand or one in a million?

I'll dump the eight Tenergy LiFEPO4s that I have, and stopped using when the 5v NiMH came out, once I get supporting info from you, Mike. I, for sure, will not use them stacked, ever again, unless it is in a PV with your chip and you give the go ahead.

Thanks, Feisty Alice
 

FeistyAlice

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read & understood. Since my Infinity is my only stacked batt unit, I asked my husband to inspect it. He said that there is more than enough holes in it to vent properly. He also said that he is glad I buy the "good batteries".

I'm sure that was music to your ears.:) I have eight AWs and one set of the Powerizers I purchased with the BP, so tossing the Tenergys won't hurt so much.

Hugs, Alice
 

BuzzKill

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Important Question for Mike. Is your chip able to deal with the low C rated battery issues?

Thanks, Feisty Alice
Well really it comes down to Current draw so at 8.3 watts IF you use a 3 ohm attys you will draw 1.62 amps of current , you can do this ALL day and never turn it off and the battery will be OK , this is why we say do not use LR atty/carto they add current draw !

They are designed to take higher loads for short periods of time like we do , they are NOT designed to do this continuously . Our chip limits current draw to 3 amps MAX so the battery will never see more that that load on it .
 

FeistyAlice

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Well really it comes down to Current draw so at 8.3 watts IF you use a 3 ohm attys you will draw 1.62 amps of current , you can do this ALL day and never turn it off and the battery will be OK , this is why we say do not use LR atty/carto they add current draw !

They are designed to take higher loads for short periods of time like we do , they are NOT designed to do this continuously . Our chip limits current draw to 3 amps MAX so the battery will never see more that that load on it .

Thanks Mike. I personally am going to chuck the low C Tenergys mainly to make life less complicated and have room for better batteries. Right now I'm using your Powerizers, with Tank and a 2.7 ohm carto at 5.1 volt, on BP. Was doing a little < 5v when carto was fresher.

There are those of us who need a simple yes or no. Me especially, now, as my brain is still "on vacation" from the affects of the flu. So what would be the outcome, mostly to the batteries, using a device with your chip, with say putting a 1.5-1.7 ohm atty/carto on, with the low C rated batteries, like those <1. I understand the concept of the chip limiting the draw on batteries but will it do so enough when an LR carto/atty is used and voltage is cranked all the way up. I can see people doing this either by mistake or to "try it." Any dangers in any way to person or battery asking a battery to supply 2.6 when it can only do, say, .70?

In other words, for those who don't want to or can't afford to purchase more appropriate batteries, any dangers to person or batteries with LR atty/carto, with voltage cranked up all the way, and very low C rated batteries, <1?

Thanks. I don't mean to be difficult but it take time for people to absorb and understand and, like I said, some need more hand holding than others. Is it best to just chuck the low C rated batteries?

Hugs, Alice
 
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FeistyAlice

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Well I've spent the night reading. It's clear now that no small Tenergy batteries will go near any of my mods, stacked or single, even the BP. All small Tenergys are going into the recycle box after their contact points are well taped up. Reading this link, again, made is clear as a bell. http://www.e-cigarette-forum.com/fo...-mods-update-february-2012-a.html#post5327522

I will, though, use Mike's Powerizers. I have been enjoying great preformance using them in the BP.

Feisty Alice
 
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