You act as if you were the only one who bought the SS for the 6V vape option....Well i hate to break the news to you mrtuna....I bought one as well... So did 3 of my friends....And last but not least 2 of my family members bought them too....And on top off all that, probably everyone on this forum...To make my point, i will keep it short....When Dave built the SS there was no known problems with the cr2 batts at all....And since David is not a fortune teller,he could not have predicted the future,that some day these batts are going to blow up in someones face....
PS This is not a personnel attack on you mrtuna... So please, do not take this post response in the wrong way....I am just stating facts....
Thanks redrhino...
mrtuna I do see your point....But cr2's batts were not manufactured by David...All David did is, use cr2's measurements to make the smallest device possible to utilize cr2's for a 6V vape....I do understand your concern....But please think out side the box for a moment...Dave did not manufacture the batts....All he did is, use them in his device, just like the BB manufacturer did, and a lot of other PV's out there use the same batts...Just like the flashlight that you are referring too...If your cr2's blow up in your face, while you are using the flashlight....Is it the flashlight manufacturers fault? or is it the batts manufacturers fault? I hope I'm making sense here...
I have this question out in a couple of threads and waiting for one of the battery experts (of which I'm not) to respond.
What is the "rated" discharge rate for these batteries? What is the discharge rate when using 2 CR2s to get 6v across a 2.2 ohm resistance (like a 510 atomizer). Is it something where it exceeds the recommended discharge rate? but is tolerable if done in short bursts?
It's not recommended to charge Li-Ions at more than 1C. What about discharge?
I don't fully agree with your feeling that "they just make the device, they don't make the battery". If the device is designed to operate within the capabilities of the battery then, yes, I agree. If the device, used in that manner is pushing the limits or exceeding the capatilities of the battery then, no, I don't agree.
Yes, I would find it acceptable if it's made very clear that you *could* do this or that but these are the risks and the product is only designed for this application. When you put a device up there and say this can be used at 3.7v or 6v then you should be able to do that without exceeding the capabilities of anything needed to do so. Or there should be a disclaimer that the device can operate at 6v but there are no batteries designed to do so that fit.
The more I read the more I am inclined to believe this is really a more general issue concerning 2 lithium batteries in series made worse by how much we abuse them. These are supposed to be long life photo batteries. The CR2 for example is designed to hold is charge through long periods of non-use. We power discharge these things in a few hours and often charge and discharge them multiple times in a day. Personally I think if you use any device with any 2 rechargeable lithium batteries you should keep them paired and check them daily for wear and with a multimeter to see if they are still taking their charge.
Not really a reasonable expectation when you're selling to the public. Joe Blow new e-cig user is going to go to one of these polished looking websites and buy that polished looking mod. He's likely to assume it's just like buying something at K-mart and not realize that he should have some fairly detailed knowledge about battery technology, charging, discharging, and monitoring.
I don't think we're "abusing" batteries. But batteries have rated charge rates and, maybe more importantly in this context, rated discharge rates. Within the rated parameters it doesn't make much difference if a battery is in constant being repeatedly charged and discharged.
It is certainly true that in each instance it was paired batteries that caused these incidents. However, would regular protection circuits make a difference when it it comes to catastrophic failure or not? That is one that needs to be answered.
I'm not sure. Protected batteries have a circuit (pcb) that will internally disconnect the battery when it is either over charged or completely depleted. I believe that these circuits will also disconnect the battery if the maximum discharge rate is exceeded.
What I don't know is if all protected batteries have the discharge rate protection. It may be that all protected batteries are protected from overcharge and undercharge but only some protection circuits additionally protect from excessive discharge rate.
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