I have some of those dangerous green CR2s coming from DX - if they'll ever get here!
What are you using yours on Zofryer?
CR2 LiFePO4 batteries with charger
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I have some of those dangerous green CR2s coming from DX - if they'll ever get here!
What are you using yours on Zofryer?
Several mods made by other manufacturers. It would be bad form to post about them in a vendor's forum.
Kinda hard to argue with fear I guess. Thing is, the protection circuit isn't even a half decent insurance policy. I've had tenergy protected rcr123a's go boom on me. Think of that protection circuit like the seatbelt on a passenger airliner. That, and I'm using crafted mods with ventilation, just like the excellent BB has a vent. Any lithium battery can explode. Not having a vent to make sure the gasses are directed away from your softer parts is dumber than using unprotected batteries.
Actually, no, not every lithium battery can explode. That is why I use LiFePo4's. The chemistry will not go boom!
The chemistry in tenergy rcr123a's is lipo. They exploded. Time to rethink your position.
http://www.youtube.com/watch?v=z3o_2mwRPdw
http://www.youtube.com/watch?v=KpUXuEg3fNE
http://www.youtube.com/watch?v=W4_SP62E-zU
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Depends on which tenergies
4 Pack RCR123A 3V 900mAh Rechargeable Li-Ion Battery with Smart Charger
These are not, but the yellow less mah ones are lifep04.
Mine were lipo. Tenergy yellow rcr123a 750mAH LifePO4's. They exploded.
Anybody still confused? The protection circuit is almost a gimmick.
Also those videos are lipo not lifep04 they are different.
All batteries can pop, but lifep04 are safer. Just with a google search.
Here is the wiki on them
http://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery
All batteries can pop, but lifep04 are safer. Just with a google search.
Here is the wiki on them
http://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery
ok, so they can all blow up. All I'm saying is, I had a supposedly "safe" battery blow up, start a small fire, and wake me up. Could have burned my apartment building down. All because the homemade mod they were in got full of juice and they soaked in it for probably 12 hours. Meanwhile, I've been using cr2's for over seven months and had zero issues. I think protected versus unprotected is a lot of hype, and I'm cautioning people that if you think you are completely safe because you have a protection circuit, you are sadly mistaken. That's all.
Well here is what I've found on the subject. I am no expert.
Lithium iron phosphate (LiFePO4)
Lithium Iron Phosphate will become the preferred battery technology for traction purposes and other situations in which high discharge characteristics and cycle life are important. Lithium-iron-phosphate (LiFePO4) batteries are based on the original lithium-ion chemistry, but LiFePO4 is used as the cathode material instead of lithium cobalt dioxide (LiCoO2). The latter is found in the most commonly used batteries in laptops, cell phones, MP3 players, etc.
LiFePO4 is an intrinsically safer cathode material than LiCoO2 since exothermic reactions cannot occur in batteries based on this material:LiFePO4 cells do not incinerate or explode under extreme conditions. In addition, LiFePO4 cells have a higher discharge current, are not toxic and have a much higher cycle life than LiCoO2 cells.
Safety
LiFePO4 is an intrinsically safer cathode material than LiCoO2 and manganese spinel. The Fe-P-O bond is stronger than the Co-O bond, so that when abused, (short-circuited, overheated, etc.) the oxygen atoms are much harder to remove. This stabilization of the redox energies also helps fast ion migration. Only under extreme heating (generally over 800 °C) does breakdown occur and this bond stability greatly reduces the risk of thermal runaway when compared with LiCoO2.
As lithium migrates out of the cathode in a LiCoO2 cell, the CoO2 undergoes non-linear expansion that affects the structural integrity of the cell. The fully lithiated and unlithiated states of LiFePO4 are structurally similar which means that LiFePO4 cells are more structurally stable than LiCoO2 cells.
No lithium remains in the cathode of a fully charged LiFePO4 cell in a LiCoO2 cell, approximately 50% remains in the cathode. LiFePO4 is highly resilient during oxygen loss, which typically results in an exothermic reaction in other lithium cells.[4]
Lithium iron phosphate (LiFePO4)
Lithium Iron Phosphate will become the preferred battery technology for traction purposes and other situations in which high discharge characteristics and cycle life are important. Lithium-iron-phosphate (LiFePO4) batteries are based on the original lithium-ion chemistry, but LiFePO4 is used as the cathode material instead of lithium cobalt dioxide (LiCoO2). The latter is found in the most commonly used batteries in laptops, cell phones, MP3 players, etc.
LiFePO4 is an intrinsically safer cathode material than LiCoO2 since exothermic reactions cannot occur in batteries based on this material:LiFePO4 cells do not incinerate or explode under extreme conditions. In addition, LiFePO4 cells have a higher discharge current, are not toxic and have a much higher cycle life than LiCoO2 cells.
Safety
LiFePO4 is an intrinsically safer cathode material than LiCoO2 and manganese spinel. The Fe-P-O bond is stronger than the Co-O bond, so that when abused, (short-circuited, overheated, etc.) the oxygen atoms are much harder to remove. This stabilization of the redox energies also helps fast ion migration. Only under extreme heating (generally over 800 °C) does breakdown occur and this bond stability greatly reduces the risk of thermal runaway when compared with LiCoO2.
As lithium migrates out of the cathode in a LiCoO2 cell, the CoO2 undergoes non-linear expansion that affects the structural integrity of the cell. The fully lithiated and unlithiated states of LiFePO4 are structurally similar which means that LiFePO4 cells are more structurally stable than LiCoO2 cells.
No lithium remains in the cathode of a fully charged LiFePO4 cell in a LiCoO2 cell, approximately 50% remains in the cathode. LiFePO4 is highly resilient during oxygen loss, which typically results in an exothermic reaction in other lithium cells.[4]
Wow, that sucks dude. I'm a cr2 fan as well, been using them since February. The ones from dealextreme. As far as "protected" goes......Tenergy LiFePO4 batteries like the ones you had do NOT have a protection PCB built in. I think they are regarded as protected because of the safer battery chemistry (safer, not safe obviously). Any 3.7v LiIon batt that has "protection" has a small circuit board mounted under the shrink wrap at the negative end of the battery with a lead spot welded to the negative end, and a lead running up from that board spot welded to the positive end. Essentially monitoring the charging, discharge, short circuit blah blah blah.
EDIT: Thanks for the info Pete54, lithium cobalt dioxide (LiCoO2) are the ones that typically have PCB protection cuz they're less stable.
I have no issues with the el-cheapo CR2s from dealextreme, they're awesome, I might break the bank one day and get some of these Excellerator ones, cuz it sounds like they work pretty good. Knowing how to handle and store the batteries makes a lot of difference.
EDIT: Thanks for the info Pete54, lithium cobalt dioxide (LiCoO2) are the ones that typically have PCB protection cuz they're less stable.
I have no issues with the el-cheapo CR2s from dealextreme, they're awesome, I might break the bank one day and get some of these Excellerator ones, cuz it sounds like they work pretty good. Knowing how to handle and store the batteries makes a lot of difference.
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Well my lifiep04 CR2s are still kicking. My 2 sets have yet to die with IDK how many recharges. Which of course is a good thing.
How is everyone else's batteries holding up?
How is everyone else's batteries holding up?
I normally go a couple of hours before charging them again. I can make it thru a long movie with no problems. It really depends on how I vape on them.
Chain vapping is still about an hour.
Concerning the Excellerater batteries, mine are still working great. They do only last me about one hour which is a shame. I'm about to buy a SB just so I can utilize my Tenergy CR123 LiFepo4 batts at 750mAh.
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For me, they run much longer when I use high voltage atomizers. However, not everyone likes them as they vape cooler than the standard attys.
Interesting. I never thought about that. What is the benefit with using HV atty's. Don't you just end up with what you would have had at 3.7? I can see using them for 2x3.7v batts running at +7v but if you start with 6.4v and about 5.6 under load, wouldn't you end up around 4.2 under load?
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