Battery amp rating?

[Davidl41]

I've got a 30amp sammy 25r. There are a few in the 40+ amp batteries on the market.

What does 30 amp continious discharge mean? The higher the amp on a battery the better it will handle higher wattage?

At 80-150 watts do I need a 40 amp or higher battery? Will a 30amp be able to hold me down at this high of a wattage safely?

 

[d4gger]

Short answer - no and no.

A 25R is a 20A battery, and I hold any seller who would call it a 30A suspect of selling fakes.

There is no 40A CDR 18650 on the market.

 

[zoiDman]

I've got a 30amp sammy 25r. There are a few in the 40+ amp batteries on the market.

What does 30 amp continious discharge mean? The higher the amp on a battery the better it will handle higher wattage?

At 80-150 watts do I need a 40 amp or higher battery? Will a 30amp be able to hold me down at this high of a wattage safely?

As mentioned your 25R's are rated at 20 Continuous Amps. Not 30 Amps.

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batteries are given 2 Different Amp Ratings. Max (or Peak) and Continuous

The Max amp Rating is the Maximum Amps the Battery can provided without being Damaged for a Very Short period of Time. The problem is this time period may be 1/10th of a Second, a 1/2 Second, maybe 1 Second, depending on what the Manufacture wants to define it at. The Maximum Amp Rating Should NEVER be used when considering a battery for an e-Cigarette. Because we Hold the Power Button Down Longer than these Brief periods of time.

The Continuous Amp rating say that a Battery should be able to Provide these Amps for as long as the User wants and it will Not Damage the Battery. This is the Rating that Should be considered.

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There is No Way to know how many Amps you are asking your battery to Provide at 80 ~ 150 Watts unless you know what the Ohms of the of the Coil(s) are.

Amps, Volts and Ohms are all tied together in a Dance given by Amps = Volts / Ohms. So if one changes, something Else needs to change to stay in Equilibrium.

 

[edyle]

I've got a 30amp sammy 25r. There are a few in the 40+ amp batteries on the market.

What does 30 amp continious discharge mean? The higher the amp on a battery the better it will handle higher wattage?

At 80-150 watts do I need a 40 amp or higher battery? Will a 30amp be able to hold me down at this high of a wattage safely?

with 20 amp batteries
using 3 volts
watts = volts x amps
you can reliably get 60 watts per battery.

 

[KenD]

with 20 amp batteries
using 3 volts
watts = volts x amps
you can reliably get 60 watts per battery.

Was gonna say that. Resistance doesn't factor into the amp draw calculations on a regulated (vw) mod.

Sent from my C6903 using Tapatalk

 

[Mooch]

I've got a 30amp sammy 25r. There are a few in the 40+ amp batteries on the market.

What does 30 amp continious discharge mean? The higher the amp on a battery the better it will handle higher wattage?

At 80-150 watts do I need a 40 amp or higher battery? Will a 30amp be able to hold me down at this high of a wattage safely?

I put together a table that might help you understand what amps, wattage, and coil resistance different batteries can handle...

18650 Safety Grades -- Picking a Safe Battery to Vape With | E-Cigarette Forum

 

[Baditude]

Here's additional information on battery amp ratings:

Battery Basics for Mods

Purple Efest Batteries: Not as Advertised



Continuous Discharge Ratings vs Pulse (Burst) Discharge Ratings, Why You Need to Know the Difference

The "continuous discharge rating" in amps is the standard specification for amp limits within the battery industry. It is a determination made by the manufacturer and represents the amp limit a battery can be safely used before it will fail.

The "pulse or burst" discharge rating is not a specification standard within the battery industry. Every manufacturer or vendor seems to have their own definition of what the pulse rating is.

A pulse discharge rating is any use above the continuous discharge rating. It is never safe and not within the intended operating parameters of the battery. You should not operate your device above the continuous rating if you can help it. The pulse rating is a condition in which the battery is on basically a buildup to failure. It is exceeding the sustainable and intended discharge rate of the battery. It is inappropriate for a consumer device to operate in the pulse range of its battery.

Which would be why we shouldn't rely on any pulse rating. Any failure, mechanical or electronic, that fires the mod will operate in the 'continuous' mode. If your setup relies on a pulse rating, it's instantly over spec.

If your amp draw is safely in the continuous discharge range, your coil could act almost like a fuse and burn out before the battery is stressed. If you are already running the battery at the edge of it's limits (pulse), there is no margin of safety.

I am of the mindset that you should leave a margin of safety when deciding what resistance coil to use. We probably place too much faith into cheap ohm readers in being precise and accurate. Also, a RDA's post screw unknowingly coming loose can greatly change the coil's resistance.

Everyone is free to set their own parameters, and I can only say what mine are.

I try to never exceed 50% of the CDR (continuous discharge rating) of a fully charged battery (4.2v). So with a 20A batteries, that would be 10A. An Ohm's Law Calculator tells me that a .4 ohm build is as low as I would want to use.

The reason that I place a 50% limit is because as a battery ages the mAh of the battery degrades, as the mAh degrades so does the batteries c rating (amp limit). So down the road, your 20A battery may only be a 10A battery.

 

[Davidl41]

Im not that bright so everything is passing by my head. Please bear with me.

I have a 25r I guess its a 20A. The seller is based in Toronto - Canvape. Description: Samsung INR18650 25R 30A 2500mAh High Drain Battery.

Im using a VW MOD. It goes up to 150 Watts. What battery can vape that high of a wattage safely or at least up to 100 watts. Im looking for a 30+ amp discharge? What is the formula for VW devices?

 

[TonyB66]

Higher wattages are used for coil builds with thicker wires so that they heat up quickly. Concentrate on the ohm reading of your coil builds and use a calculator to find how many amps you will require. As has been said there are no 18650 batteries available that will reliably push 30a+ on a continual discharge basis. Anything that says it does is just a load of marketing rubbish.

With a regulated mod you should have a bit more safety but don't push to the limits. You shouldn't need all 100watts to get a decent vape unless you are running some sort of mega thick coil.

What wire gauge do you use when building coils? What is the resistance of your build?

 

[Mooch]

Im not that bright so everything is passing by my head. Please bear with me.

I have a 25r I guess its a 20A. The seller is based in Toronto - Canvape. Description: Samsung INR18650 25R 30A 2500mAh High Drain Battery.

Im using a VW MOD. It goes up to 150 Watts. What battery can vape that high of a wattage safely or at least up to 100 watts. Im looking for a 30+ amp discharge? What is the formula for VW devices?

For a VW mod you can calculate the max current it will draw with the following equation:

Max Amps = Max Watts / Low Voltage Cutoff

The low voltage cutoff is one of the specs for the mod. It may be called "minimum battery voltage" or something like that. Assuming 3.2V, a common rating, that means Max Amps = 150W / 3.2V = 46.9A for a single battery 150W mod. No 18650 can handle that.

Do you have a dual battery 150W mod?

My safety grades table that I linked to above lists how hard you can run about 40 different batteries. Just pick the ones that don't have a red Fail grade at 30A.