What battery is best?
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Neither one of those would be "best" for an SVD.
The SVD is a regulated mod which requires a high drain battery for best performance. The Panasonic NCR18650B 3400 mAh battery is not a high drain battery (just a high capacity battery...two different things), and also only has a 6.8 amp limit. Regulated mods can pull up to 10 amps power from a battery with their pulse-fire regulation (PWM). Technical - Why high drain batteries?
The Sony 18650VTC4 2000 mAh 30 amp battery is indeed a high drain battery, but you don't really need all that amp power in reserve. These are best suited for sub-ohm coils. A better choice than the above battery, but you can do better.
IMHO, the best high drain, general purpose battery at the moment is the Panasonic or Orbtronic NCR18650PD or PF 2900 mAh batteries. Both have the required 10 amps and the 2900 mAh will last a long time in an SVD, longer than the 2000 mAh Sony.
NCR18650PD 2900 mAh
NCR18650PF 2900 mAh
The SVD is a regulated mod which requires a high drain battery for best performance. The Panasonic NCR18650B 3400 mAh battery is not a high drain battery (just a high capacity battery...two different things), and also only has a 6.8 amp limit. Regulated mods can pull up to 10 amps power from a battery with their pulse-fire regulation (PWM). Technical - Why high drain batteries?
The Sony 18650VTC4 2000 mAh 30 amp battery is indeed a high drain battery, but you don't really need all that amp power in reserve. These are best suited for sub-ohm coils. A better choice than the above battery, but you can do better.
IMHO, the best high drain, general purpose battery at the moment is the Panasonic or Orbtronic NCR18650PD or PF 2900 mAh batteries. Both have the required 10 amps and the 2900 mAh will last a long time in an SVD, longer than the 2000 mAh Sony.
NCR18650PD 2900 mAh
NCR18650PF 2900 mAh
http://www.e-cigarette-forum.com/forum/provape/334831-technical-why-high-drain-batteries.html
Why Provape engineers would make this claim, yet offer a product like the MINI that uses a battery with a 6A rating sure is confusing now isn't it...
Why Provape engineers would make this claim, yet offer a product like the MINI that uses a battery with a 6A rating sure is confusing now isn't it...
http://www.e-cigarette-forum.com/forum/provape/334831-technical-why-high-drain-batteries.html
Why Provape engineers would make this claim, yet offer a product like the MINI that uses a battery with a 6A rating sure is confusing now isn't it...
No, not confusing to me. You apparently never considered the battery C rating.
The difference between the two batteries in question is in the C rating . The PanasonicNCR1865B 3400 mAh battery only has a 2 C rating, the AW 18350 IMR has a 6.5 C rating. The fact that such a small battery as the 18350 has the same amp continuous discharge rate as a larger 18650 battery should tell you something, huh?
Batteries can be either high drain (IMR), high capacity (ICR), or a hybrid mix of the two (IMR/ICR). The Panasonic B 3400 mAh battery is essentially a hybrid battery with the chemistry mix leaning much more heavily towards the ICR end than the IMR end. That's how they pack all those mAh into the battery, yet it loses its high drain capacity and most of its safe chemistry in the same process. Consider the Panasonic B battery as an ICR battery functionally. Since this battery loses much of its safe chemistry, Orbtronic makes this same battery in a protected version.
You are correct the AW 18350 IMR has a 6 amp continuous discharge rate, but because of its much higher C rating it will have a higher pulse continuous discharge rate than that Panny will. It will be able to supply the pulse currents required of a regulated mod while the Panny will not.
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I notice that you never miss an opportunity to take a jab at Provari owners or at Provape. Give it a rest.
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TThanks man I'm no battery expert so I figured I would ask. Is there a difference in the two linked?
The two models are very similar. The PF is the more recently released model, with slightly more capacity (although not indicated by the listed mAh) and higher heat tolerence according to Panasonic.
Baditude, quick question...
you mentioned the Sony 30 amp for sub-ohm, but being Lithium batteries, doesn't that mean they are less safe based on the chemistry
you mentioned the Sony 30 amp for sub-ohm, but being Lithium batteries, doesn't that mean they are less safe based on the chemistry
its not like you have any real alternatives, ni-mh and led acid are way heavier and bigger for the same amount of power capacity. There is a distinction to be made between lithium batteries themselves though as there are different types.
The most common one - LiCoO2 or in some parts known as ICR types are the most volitale and easily damaged and overheated. (and by easily i mean 150C which is quite hard to accomplish unless a sustained short occurs)
Then there is LiMN (or IMR) which is way harder to make explode because it tolerates more stress and has higher thermal runaway temperature. It does have lower capacity though.
Next up is LiFePo4 (or IFR) which is even more stable but also even lower total capacity.
The really big 3+ Ah 18650's are usually a proprietary hybrid between LiCoO2 and either LiMN or LiFePo4
The most common one - LiCoO2 or in some parts known as ICR types are the most volitale and easily damaged and overheated. (and by easily i mean 150C which is quite hard to accomplish unless a sustained short occurs)
Then there is LiMN (or IMR) which is way harder to make explode because it tolerates more stress and has higher thermal runaway temperature. It does have lower capacity though.
Next up is LiFePo4 (or IFR) which is even more stable but also even lower total capacity.
The really big 3+ Ah 18650's are usually a proprietary hybrid between LiCoO2 and either LiMN or LiFePo4
I have been using the Panasonic NCR18650B for a few months in my eVic all the way up to the 11 watt max. No problems. Not sure if I am degrading the expected life, not sure if on day it will blow up, not sure if I am getting all that I should power wise. But, I can vape for two days on a single battery. I like that. Actually, it is the only thing I like about my setup.
All the batteries that we use in mods are Lithium batteries. These come in different sub-chemistries.
Protected ICR lithium batteries use a volatile (flamable) Cobalt chemistry, requiring manufacturers to add built-in protection circuits in them so that they are anywhere near safe to be able to be used in the first place. Often listed only as Li-Ion batteries. These typically have a very high capacity (mAh).
IMR (Li-Mn) lithium batteries use Nickle and/or Manganese in the chemistry which makes them "safer chemistry" - these do not require built-in protection and therefore they are often called unprotected. These are also called "HIGH DRAIN" - they have less capacity but have a higher energy output for high energy needs.
Hybrid lithium batteries use a mix of chemistries of ICR and IMR for both higher capacity and high drain properties while still retaining their safer chemistry. (The Panasonic 3100mAh & 3500mAh hybrid batteries have their chemistry leaning so heavily toward the ICR spectrum that they can essentially be considered an ICR battery functionally and losing the high drain ability.)
The Sony 30 amp batteries are a hybrid battery, so they can be considered a safe chemistry and high drain battery. Unless you are doing sub-ohm coil builds, the 30 amps are overkill and not really needed for general purposes.
DEEPER UNDERSTANDING OF MOD BATTERIES
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