Samsung 25-R (smurf batteries) PULSE RATING?

[CLOUDKICKER]

hi ecf users,

does anyone know the actual pulse amp limit on the samsung 25-r batteries?
sources would be nice as well to back up the amp limit.

thanks guys!

 

[sonicbomb]

There is no actual pulse amp limit, that's the point. Mooch tested the 25R and gave it a 20 amp CDR, above this is uncharted territory.

 

[Baditude]

Why do you want to know the pulse rating? It is a worthless, insignificant rating that disreputable vendors came up with to get uninformed consumers to buy their batteries over the more reputable brands.

Battery Amp Ratings: Continuous vs Pulse Ratings
Battery pulse ratings are useless! | E-Cigarette Forum
There are no 18650 batteries with a genuine rating over 30A!
Are You Using a ReWrap Battery?

 

[Assi]

I agree that using pulse as a Marketing Argument is wrong, however there is Information coming from Samsung SDI regarding Pulse time and Maximum Discharge current:
30A = 6 seconds
40A = 5 seconds
65A = 1 second

 

[CLOUDKICKER]

There is no actual pulse amp limit, that's the point. Mooch tested the 25R and gave it a 20 amp CDR, above this is uncharted territory.

how are people sub ohming with dual 22 guage 5 wrap. resistant is super low. i'd assume VTC4 or VTC5 would be best but i'd like to know the pulse amp limit so i guess i can build lower.

 

[T0mmy1977]

how are people sub ohming with dual 22 guage 5 wrap. resistant is super low. i'd assume VTC4 or VTC5 would be best but i'd like to know the pulse amp limit so i guess i can build lower.

A dual 18650 parallel mech box would give you an amp limit of 30 amps with 2 x 25Rs. I'd prefer that than pushing a single 18650 to its limits.

I corrected my post to say '30 amp limit'. Thanks to @r055co

 

[r055co]

A dual 18650 parallel mech box would give you an amp limit of 40 amps with 2 x 25Rs. I'd prefer that than pushing a single 18650 to its limits.

Dual parallel with Samsung 25R's would have a 30 amp limit, NOT 40. You only add 1/2 the amps of the next battery.

Sent from my Nexus 6 using Tapatalk

 

[T0mmy1977]

@r055co Thanks - I corrected my post. I'd hate to post an incorrect and unsafe information.

 

[sonicbomb]

how are people sub ohming with dual 22 guage 5 wrap. resistant is super low. i'd assume VTC4 or VTC5 would be best but i'd like to know the pulse amp limit so i guess i can build lower.

Did you read the first article that Baditude posted?

The point is that a few years back if you wanted to blow big clouds, a mech and a very low resistance build was the only way to go. Tech has moved on since then, if you want to use more than 60 watts safely just use a multi-battery box, simple. Everyone is free to set their own safety limits, I and others here advise people to stay within the known CDR.
Vaping is freedom from tobacco and to some a fun hobby, it doesn't in my opinion need to include completely unnecessary danger.
You may pulse a battery above it's CDR for years and you may get away with it, you might not. But you can be sure that I will not advise someone to do it. You can call me paranoid, but I've seen first hand the explosive power of a venting 18650, and it's scary.

If you haven't already take the time to read Mooch's blog

 

[Baditude]

how are people sub ohming with dual 22 guage 5 wrap. resistant is super low. i'd assume VTC4 or VTC5 would be best but i'd like to know the pulse amp limit so i guess i can build lower.

Many "misinformed" sub-ohmers still believe the Sony VTC4 and VTC5 are the top current handling batteries on the market. Wrong! Both are excellent 20/23 amp continuous discharge batteries, but for the lowest builds you will need a true 30 amp continuous discharge battery.

Sony VTC4 2000mAh 18650 Retest Results...a great 23A 2100mAh battery

Sony VTC5 2500mAh 18650 Retest Results...a great 20A 2600mAh battery​

I won't go into the continuous vs pulse debate again here. I've already posted links above on why to only rely on the continuous rate.

In Battery Mooch's bench tests, we can find five batteries from LG and one from Sony which are 28 - 30 amps continuous discharge rate. That's the best that current 18650 battery technology has to offer us. You'll be sacrificing capacity (mah) for all of those amps though; all six batteries have only 15000 mAh.

Sony VTC3 1500mAh 18650 Retest Results...a hard hitting 28A 1600mAh battery

LG HB2 30A 1500mAh 18650 Retest Results...a great 30A battery, about equal to VTC3

LG HB4 30A 1500mAh 18650 Bench Test Results...a fantastic 30A battery, beats HB6 when pulsed!

LG HB4 "Mustard" 30A 1500mAh 18650 Bench Test Results...a great 30A battery, better than brown HB4

LG HB6 30A 1500mAh 18650 Bench Retest Results...a fantastic cool-running true 30A battery, but low capacity

LG HB6 Pink 30A 1500mAh 18650 Bench Test Results...great 32A/1500mAh battery, better than ivory HB6

 

[Mooch]

I agree that using pulse as a Marketing Argument is wrong, however there is Information coming from Samsung SDI regarding Pulse time and Maximum Discharge current:
30A = 6 seconds
40A = 5 seconds
65A = 1 second

Is this for the cell itself as a repetitive pulse rating or a one-shot pulse limit for the battery management/protection system?

If it's a cell pulse rating there should be a duty cycle and some critera for how they set the rating (max temp, capacity loss, min voltage, etc.).

 

[Assi]

You are right. I will try to add those asap as an image

 

[r055co]

how are people sub ohming with dual 22 guage 5 wrap. resistant is super low. i'd assume VTC4 or VTC5 would be best but i'd like to know the pulse amp limit so i guess i can build lower.

Me, I'll vape a 22x2/34 fused Clapton on my Rafael X rda. With the neutral post you run the coils in series, love that rda

Sent from my Nexus 6 using Tapatalk