Hotvapes exceeding amp limit on stock device

[strugglinvape]

Long time reader but first post;
I own a Hotvapes 650mah pen that came with a 1.8ohm coil in the package. When fully charged it puts out 3.7 V. If I am correct, at 650mah the amp limit should be 1.3 (650 * 2C = 1300). At 3.7 V and 1.8 ohms, the it is discharging at a rate of 2.06 amps. Is it safe to vape at over 150% of the amp limit? I do not feel safe using this at 1.8 ohms because basically everything I read says DO NOT exceed the amp limit. There are 2 vape stores in my area and I asked both of the owners if it was safe and they have never even heard of an amp limit. They even tried selling me a lower ohm atomizer. I do not think they have ever even used ohms law before. This is very disconcerting as I know they are selling high voltage batteries and low ohm atomizers to amateur vape customers without knowledge of ohms law. I basically had to teach them about ohm's law and how to calculate the amp limit. Am I missing something or possibly overreacting?

 

[Alien Traveler]

mah is a capacity measure, not amperage.

 

[strugglinvape]

mah is a capacity measure, not amperage.

How do you calculate the max discharge rate?

 

[xtwosm0kesx]

The ego battery should have protections in place preventing it from firing a build that's too low/will draw too much power.

Can really remember but my brain is telling me that most of the egos could handle about 2.5a draw, again just a fuzzy memory.

 

[IMFire3605]

Most Ego (Pen class) have a max 3amp limit, and the switch itself (fire button) has an amp limiting affect, max current won't exceed say 2 to 3 amps the switch allows through. A 1.5ohm coil will push max 2.46 amps at 3.7volts.

 

[Baditude]

You only need to be concerned about exceeding battery amp limits when using a mechanical mod. There is no protection circuitry in a mechanical mod, so when you press the fire button it will attempt to fire any ohm coil regardless of the amp limit of the battery. Exceeding that amp limit could cause the battery to go into thermal runaway.

The battery device that you are using I suspect is a regulated battery device - an eGo style battery. It has a protective chip inside which will prevent the battery from firing a coil which is not within the safe range of the chip or battery. You have no reason to be worrying about a regulated battery device.

 

[Alien Traveler]

How do you calculate the max discharge rate?

You cannot without rather special tests. You have to ask a manufacturer. But, as already was said, your device will not fire a coil with unappropriated resistance.

 

[strugglinvape]

Thanks I feel much better about using the 1.8 atomizer now. I also have a vision spinner 2 mini twist and used ohm's law and what I thought was the maximum discharge formula (C*MAH) in order to figure out what ohm coil I should use and at what voltage. I don't know where I got that formula from but I guess I'll throw it out

 

[strugglinvape]

I just received an email from Hotvapes; the 650mah batteries have an output of approximately 2.5 amps

 

[LewAz]

Milliamps Hour (mAh) is the strength or capacity of a battery. The higher the mAh, the longer the battery will last. Milliamps Hour is 1/1000th of a Amp Hour, so a 1000mAh = 1.0Ah. Voltage is the gas...mAh is the size of the gas tank. Hope this helps

 

[Baditude]

What does a battery's C Rating mean?

 

[strugglinvape]

What does a battery's C Rating mean?

Okay so apparently the [(C*maH)/1000] formula is right according to this. Either the manufacturer is giving me a higher estimate on the amp limit or I'm not correct in that the battery has a discharge rate of 2C.

 

[Baditude]

Either the manufacturer is giving me a higher estimate on the amp limit or I'm not correct in that the battery has a discharge rate of 2C.

It wouldn't be the first time that a manufacturer over-rates their battery specs.

Purple Efest Batteries Not As Advertised

 

[Topwater Elvis]

Again, ego type batteries have amp limits that they will not exceed, short circuit protection and over charge & under discharge protection.
Occasionally one, some or all of the protections might malfunction or fail, it is quite rare.

Usually when an ego type malfunction occurs it is due to damage, abuse, tampering, Using the wrong or malfunctioning charger, high heat, poor or no maintanance.

 

[Steamix]

Wouldn't max out on the C rating myself. 'Spread' in mass production, the trend that marketing got more say than engineering....

Vaping is like flying : Never hurt to have a bit of a safety margin

 

[strugglinvape]

Again, ego type batteries have amp limits that they will not exceed, short circuit protection and over charge & under discharge protection.
Occasionally one, some or all of the protections might malfunction or fail, it is quite rare.

Usually when an ego type malfunction occurs it is due to damage, abuse, tampering, Using the wrong or malfunctioning charger, high heat, poor or no maintanance.

I understand that now. I would just prefer not to push my battery to those fail safes. I trust my math more than what a manufacturer tells me and more than fail safes that work say 99.9% of the time.

 

[r77r7r]

As a long term ego user, The 3.7v would generally handle the lower ohms better than the 3.4v batts.

1.8 is fine, the only issue I ever had is a knockoff when running dual coils @1.5ohms. Went thermal, but didn't vent or blow.

 

[r77r7r]

The Spinner has a low limit also and will allow you to crank it up but won't actually give you the results desired or shown.

 

[strugglinvape]

The Spinner has a low limit also and will allow you to crank it up but won't actually give you the results desired or shown.

Yeah I really wasted my money on it. I was in a rush and didn't pay too much attention to what the specs were. 1.8 ohms on the spinner is pushing it.

 

[strugglinvape]

The Spinner has a low limit also and will allow you to crank it up but won't actually give you the results desired or shown.

Pretty positive I purchased a knock-off spinner also