Are vent holes easy enough to do yourself, will it compromise the device where its machined so thin? Can I pay you a little extra to have some added David? I want to use mine @6volt but there is not alot of selection for protected cr123as at 3 volt so i've ordered the 3volts at 1000mah unprotected.
p18650 vent holes
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I guess you didn't search too hard.
AW LiFePO4 3 Volt Lithium Rechargeable Battery
Tenergy LiFePO4 RCR123A 3.0V 750mAh Rechargeable Battery
Tenergy RCR123A 3.0V 900mAh Rechargeable Li-Ion Battery
AW lifepo4
Let me guess you shop at Deal Extreme
AW LiFePO4 3 Volt Lithium Rechargeable Battery
Tenergy LiFePO4 RCR123A 3.0V 750mAh Rechargeable Battery
Tenergy RCR123A 3.0V 900mAh Rechargeable Li-Ion Battery
AW lifepo4
Let me guess you shop at Deal Extreme
There's no way you could drill the holes yourself without a *Really Nice* drill press.
It's Stainless Steel... If you had the machinery to do it, you'd be making your own....
Some people do but, I wouldn't worry about vent holes.. I seriously doubt gas'll be getting out of this thing... Besides, vent holes let the batteries / spring show.. Not very Precise (insert Pun sound here)
Maybe David could thread both ends on one and see what they rupture at?? *JK*
It's Stainless Steel... If you had the machinery to do it, you'd be making your own....
Some people do but, I wouldn't worry about vent holes.. I seriously doubt gas'll be getting out of this thing... Besides, vent holes let the batteries / spring show.. Not very Precise (insert Pun sound here)
Maybe David could thread both ends on one and see what they rupture at?? *JK*
The Tenergy batteries work good and are a safer chemistry. Vent holes could be put in it, but you can't drill them yourself without specialized equipment. Trying to drill a round stainless tube will just have your drill bit flexing off to the side most likely. I could put some in if you wish, so just let me know.
Best,
David
Best,
David
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I'd go with the AW 3.0V LiFePo4...it's been asked of the AW dealer and he's said that they can handle up to a 10C discharge rate without issue
meanwhile the tenergy 3.0V Lifepo has a max drain rate of <500mA...so running them at 6V will overstress the hell out of them...
meanwhile the tenergy 3.0V Lifepo has a max drain rate of <500mA...so running them at 6V will overstress the hell out of them...
hey David,
i didn't know that we could ask for vent holes. can you do that for my p18 order? or is that not necessary since the device only uses one battery?
i didn't know that we could ask for vent holes. can you do that for my p18 order? or is that not necessary since the device only uses one battery?
with just one battery and a mechanical switch it's basically impossible for the battery to short from the switch contact or become unstable due to unequal cell voltages.
*If your going to run 18650's*
*If your going to run 18650's*
... in addition if you use AWs the batts don't explode they vent same as LifePOs (diffrent chemistry). Should a thermal runaway occur, toss it aside or in a sink if one is available whatever. Vent holes where created for totally sealed units e.g the silver bullet which has the potential of becoming a pipe bomb in minimising pressure build up, preventing explosive failures. However, vent holes will assist in venting, they cannot vent adequately in the case of a thermal runaway (think nuclear), and will result in an unserviceable unit regardless in many instances.
Therefore, buy good batteries especially if you are going to use them in series (stacked). Always charge them in pairs, and use them in pairs. The majority of the reported accidents could have been prevented with a larger wallet and due dilligence.
I was under the impression that Precise button assembly offered some venting, so it's not really a sealed unit?
On the Precise, a cool place to put additional venting could be smack thru the center of the button slug, or maybe smack in the center of the "P" engraved on the slug, or maybe engrave a "P." where the "." is a vent
On the Precise, a cool place to put additional venting could be smack thru the center of the button slug, or maybe smack in the center of the "P" engraved on the slug, or maybe engrave a "P." where the "." is a vent
The end switch assembly is, for all practical purposes, sealed from the battery, so a vent anywhere below the switch assembly would be ineffective. I had a couple of requests to put vent holes just above the switch (at the bottom of the battery) which i'm going to do, so if you want it, i could do that. With an AW protected 18650 or similar battery, vent holes are probably over kill. Personally, i like the clean look of no vent holes on the Precise, but it's a personal opinion.
IMHO placing vent holes just above the switch would prove pointless as AW batts vent from the positive end (design).
Vent holes designed after the unfortunate incident, were designed to vent away from the individual, angled away from their face and prevent catastrophic failures (read exploding). If there is sufficient room in the device to accommodate the rapid expansion of gases, then by all means these vent holes at the bottom will provide a greater degree of protection, providing the handling volume of the vent holes are indeed capable of handling the expansion of the gases generated. The latter would ensure venting whilst prevent extensive damage to the unit.
In the case of the precise, because of internal clearances of the unit, there is no way to sufficiently vent the unit without making it into a cheese grater during a thermal runaway.
IMHO instead of looking at someone else to ensure ones safety, it is my humble opinion that folks that are paying top dollar for a battery mod, stop skimping on batteries and buy the best batteries and charger that one can buy, with a reputable track records. It is further my belief that folks that are going to use their device outside of intended norms, learn the possible dangers associated with using the device outside of recommended norms.
A battery mod = PIPE BOMB, and more dangerous when batteries are used in series (stacked). That being said so is your cell phone. But we do not hear of too many cell phones exploding, but batteries have been known to fail. Some by manufacturing defects, but most often user stupidity, or eccentricity of using a device outside of its designed characteristics. e.g using a low resistance atomiser on a 10440 batt.
David cannot foresee how you are going to use the device. It is engineered to provide a certain degree of safety when used within its design consideration and limitations. It was designed around the safest batteries on the market at this time. The rest is up to you
Safety is everyone's concern, not just the vendor.
My Cr123a`s are slightly thinner than my 18650 battery therefore they should have enough side clearence for gasses to slide down toward bottom vent holes. I plan on using this exclusively for six volts therefore vent holes ugly or not are a safety feature I`d like to have. There is no such thing as a safe battery they are mass produced by the millions some will be more safe than others.
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Derek,
I am not trying to be .... here, and you are absolutely right (wrt the manufacture of batteries). If it will make you sleep better at night by all means, but please do understand that the clearances in the Precise, regardless of how great (large) you think they are, will not be able to provide sufficient space for venting in the case of a thermal runaway. On a Silver Bullet perhaps, (you can park a Mack truck in the battery casing), but not on the Precise. Think "nuclear" for the lack of a better word of what happens to a cell when it is in thermal runaway, because that is what a nuclear device is a "thermal" runaway. Not as catastrophic but a good metaphor to explain the rapid expansion of the gases and the short time lap (seconds) one has when the battery starts to heat up.
Personally, if the batteries CR123s you posted in another thread here,
18650 compatible batteries/chargers - E-Cigarette Forum
are the ones you intend to use, well let's leave it at that, that I wouldn't even wave those batteries in front of a Precise let alone use them. You could of at least went with LifePo4 chemistry for unprotected batteries, vice the exact ones that have been known to cause problems, and are known to have caused more than one catastrophic failure in the past
I am .... because I take battery safety (any saffety seriously). We appreciate folks that are unsure of which direction to take, and ask questions. But I personally do not take kindly to folks that even after several have offered some solid advice, you go and do what you want anyway. Why are we wasting our time? Because although you are a complete stranger, I/we care!
search youtube for lipo explosions and you'll get some idea of what Switched is talking about. Even with a large unit like the SB, you're just going to create a rocket / blowtorch in your hand.
If you have a thermal runaway it won't matter if they're laying on a table with nothing around them, it's gonna be bad.
For a couple of dollars more I always buy the best batteries I can get my hands on and, when something better comes along, I switch.
I not only do this with the $10 batteries we use for vaping but also for the $259.00 batteries I use in my helicopters. Expensive, sure. Explosive, not if I can help it.
*An ounce of prevention is worth a pound of cure*
That's an old saying because it's true.
If it wasn't they'd have quit saying it a loooong time ago..
If you have a thermal runaway it won't matter if they're laying on a table with nothing around them, it's gonna be bad.
For a couple of dollars more I always buy the best batteries I can get my hands on and, when something better comes along, I switch.
I not only do this with the $10 batteries we use for vaping but also for the $259.00 batteries I use in my helicopters. Expensive, sure. Explosive, not if I can help it.
*An ounce of prevention is worth a pound of cure*
That's an old saying because it's true.
If it wasn't they'd have quit saying it a loooong time ago..
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