Asmodus Lustro Battery Indicator

[Crispycritters]

A mod cuts off at a certain low voltage levels to prevent the batteries being run so low they may become unstable - normally this is around 3.2V for a single cell mod or 6.4V for a dual.

The mod has no way of knowing the actual remaining mah capacity of the battery, all it can do is measure the voltage provided.
When a battery is at rest it may read up to 4.2 Volts but when it is put under load the voltage it outputs drops instantly, and the more current (higher wattage settings) you try to pull from the battery the higher this voltage drop will be (similar to your car lights dimming when you crank the engine because of the extra current load of turning the engine) causes the battery output voltage to drop). However, if you do this and leave the battery to stand the voltage of the battery will increase. Essentially a battery reading 4.2 Volts will never give out 4.2 Volts - mech users sometimes fixate about voltage drop through the mod, but can do nothing about battery sag - the only thing they can do is select the highest Amp rated batteries they can find, which are specifically designed for high current drain (and also tend to have the lowest mah capacity),

II think what may be happening in this case is the OP is trying to pull 80 watts from a pair of batteries that are more suited to low power MTL use. At best they are rated at 10 Amps max, but they could be 8 or even 5 Amp batteries - without knowing what the batteries actually are there is no way of being certain. But if they are 8 or 5 Amp rated then the max they can be expected to provide would be 48 and 30 watts respectively - and they would definitely suffer from huge voltage drop and show all the symptoms the OP describes

 

[WaitFor1t88]

Also just to add, the asmodus boards do tend to have a slightly higher voltage cut off, than some other boards, also the battery bars show a kind of of live voltage by the battery bar dropping down when firing
Would advise on getting some higher amp batteries, the Moli p26a for ex

 

[Crispycritters]

Lithicore and from vape shop

I had to look up Lithicore batteries as I've never heard of them.

Unfortunately these are 10 Amp batteries that simply aren't rated high enough for the wattage you are vaping at. There is nothing wrong with these batteries in terms of capacity - and they would be great for low power MTL or using in a torch where high capacity/long run time is needed, but they just aren't the right cells for medium to high power use.

It looks like you need to buy different batteries - if you intend to continue vaping at around 80 Watts I recommend you buy either Samsung 30Q ,Sony VTC6 or LG HG2 batteries (all 3,000 mah and 20 Amp rated) from Fogstar (there is a discount code POTV20). I have used all of these batteries and they are perfect for vaping at your current power settings on a dual battery mod.

If you think you will be tempted to crank up the wattage much over 100 Watts then I recommend you buy either Molical P26A or Sony VTC5A batteries. These are 25 Amp batteries and will be good for up to 150 watt vaping.

It's crap that you've got the wrong batteries, but at least its unlikely the mod is the problem which is more expensive to replace.

You can still use the batteries you have, but not at 80 watts, if you can vape at 60W or less they should be safe - the battery level display will still go up and down, but not as drastically, and the mod shouldn't cut out due to lower power when the batteries still have plenty of life in them.

 

[zouzounaki]

Lithicore and from vape shop

you’d be best to ditch them and get decent batteries.

 

[Simon G]

is this not the same thing? battery life and voltage left in the battery?

I suppose it depends on what you mean by 'life' .... with mods, I think of life as time or 'mAh remaining'. Mods don't know the difference between a 2,000 mAh cell at 3.7v and a 3,500 mAh at 3.7... it just knows it's 3.7v and shows 1/2 or 3/4 or whatever on the battery bar. But that doesn't tell you how much longer you can vape for. I guess I misunderstood the question. ... I also assumed the OP was using suitable batteries for the device and power they were vaping at, and we all know it's a mistake to assume.

 

[Mitz]

I really don't understand why people buy such crappy batteries.

 

[zouzounaki]

I suppose it depends on what you mean by 'life' .... with mods, I think of life as time or 'mAh remaining'. Mods don't know the difference between a 2,000 mAh cell at 3.7v and a 3,500 mAh at 3.7... it just knows it's 3.7v and shows 1/2 or 3/4 or whatever on the battery bar. But that doesn't tell you how much longer you can vape for. I guess I misunderstood the question. ... I also assumed the OP was using suitable batteries for the device and power they were vaping at, and we all know it's a mistake to assume.

the way i thought i understood it is that mah is a scale, that measures the amount of current available. but that the mod would just look at the voltage, and it would loosely correlate to the remaining battery life. but i don’t know if it discharges uniformly or whatever, or even how it is that we can have different batteries with different capacity. it seems complicated.

 

[andipandi]

but that would then mean that for the period of time the batteries were recovering from being stressed, that would be the capacity left in them? the life that is in a battery is the volts it contains? a genuine question, i always like to try and understand this stuff better.

It is a good question, a very good question. My mods will cut off different batteries (married sets or single) at different voltages, in the same mod. My assumption is that the batteries cant reach the current required, for the resistance and power selected (whether on a vv or a vw mod), hence the chip in the mod is only concerned with whether the batteries can deliver the required current and whatever the voltage of the batteries is, it's not significant (to the mod/chip), it merely is, what it is.

Hence, rubbish batteries, old batteries, worn out batteries, will often cut off in a higher voltage range, say 3.50-3.65v (the current cant be delivered by the chip/ batteries) Whereas brand new, genuine, high quality batteries will cut off fair lower, as low as 3.14v (i've had that) but usually in the range of 3.20 -3.40v (the current can be delivered by the chip/ batteries).

That asmodus lustro looks like a nightmare, an overblown over featured monstrosity, watch this video and be prepared to go and lie down in a darkened room

 

[oldhippydude]

the way i thought i understood it is that mah is a scale, that measures the amount of current available. but that the mod would just look at the voltage, and it would loosely correlate to the remaining battery life. but i don’t know if it discharges uniformly or whatever, or even how it is that we can have different batteries with different capacity. it seems complicated.

Eg a 3000mah battery would when fully charged, would be fully discharged if you drew 3000 milliamps (3 amps) from it for one hour.

With regards to how the voltage drops over that time is not the same for all batteries. Some the voltage drops of faster in the early stage others more gradual . Mooch has graphs for most of the cells we use and are part of why he recommends different cells for different uses.

 

[crustyfolker]

Simple answer. 3500mah batteries indicates 2 things.
1. Maximum 10.5 amps. Ok upto 30w or so but dead in minutes if you try 50-60w
2. rewrapped batteries with fake stats.
I own a Lustro Kadama, no issues if you use 20amp rated for under 100w and 25 amp batteries for over 100w. My advice buy some batteries from fogstar or 18650uk. Both recommended suppliers with a good rep. throw those lithcore in the bin they may blow up in your face, you cannot seriously trust all vape shops, but if you stick around and get to know the forum helpful advice will be shared and written for you to learn from.