How long will my batteries last?

[SpartanM]

Can anyone tell me how long I have left until I need new batteries? I honestly haven't been keeping track of my cycles, but I do know this:

-have 4 Samsung 18650 25r batteries
-currently vaping on ipv3 Li and tfv4
-on average running at 85watts at 0.2ohms
-go through a married pair of batteries a day (until low battery warning on ipv), so each battery pair is used once every 2 days
-have had all 4 batteries for over 5 months
-no isolated battery problem incidents and I've been taking good care of my batteries (i.e. not leaving them in the car or charging them overnight)

Any help would be much appreciated


-themaxster

 

[edyle]

Can anyone tell me how long I have left until I need new batteries? I honestly haven't been keeping track of my cycles, but I do know this:

-have 4 Samsung 18650 25r batteries
-currently vaping on ipv3 Li and tfv4
-on average running at 85watts at 0.2ohms
-go through a married pair of batteries a day (until low battery warning on ipv), so each battery pair is used once every 2 days
-have had all 4 batteries for over 5 months
-no isolated battery problem incidents and I've been taking good care of my batteries (i.e. not leaving them in the car or charging them overnight)

Any help would be much appreciated


-themaxster

How long does 1 battery last:
take the mAh, and multiply my 4 volts (or 3 if you want to be conservative, or 3.7 if you want to be super geek)
that gives you milliwatthours
divide by 1000 to get watthours
then divide by how many watts you are using and you get your vape time in hours; (multiply by 60 to get minutes).

so assuming you have 2000mAh battery
that's 8 watthours
divide by 80 watts = about 0.1 hours

so about 5 minutes of vape time.
that's about 300 seconds.
if you take a 5 second vape once a minute it'll last about an hour.

 

[Strangebrew]

I been using 2 batteries (18650) for three years, rotating with others.

 

[SpartanM]

How long does 1 battery last:
take the mAh, and multiply my 4 volts (or 3 if you want to be conservative, or 3.7 if you want to be super geek)
that gives you milliwatthours
divide by 1000 to get watthours
then divide by how many watts you are using and you get your vape time in hours; (multiply by 60 to get minutes).

so assuming you have 2000mAh battery
that's 8 watthours
divide by 80 watts = about 0.1 hours

so about 5 minutes of vape time.
that's about 300 seconds.
if you take a 5 second vape once a minute it'll last about an hour.

Thanks for the advice edyle!

Sorry, I should've asked my question more clearly haha. I was actually asking about when I should get new batteries, as in when my 4 batteries no longer has a pulsing amp safety rating qualified for the wattage I'm running at?


-themaxster

 

[SpartanM]

I been using 2 batteries (18650) for three years, rotating with others.

Holy eff... that's a long time lol. what batteries are they?


-themaxster

 

[ImThatGuy]

About 200-300 charge cycles.

 

[SpartanM]

About 200-300 charge cycles.

200-300 cycles = (avg) 250cycles x 2 pairs
so that's 500 days of vaping or ~16 months. thanks ImThatGuy!


-themaxster

 

[Pearl B]

I've heard about 300 charges too.

I came across a link for individual batteries

Battery test-review 18650 individual tests

 

[edyle]

Thanks for the advice edyle!

Sorry, I should've asked my question more clearly haha. I was actually asking about when I should get new batteries, as in when my 4 batteries no longer has a pulsing amp safety rating qualified for the wattage I'm running at?


-themaxster

if you're using 85 watts per battery I'm thinking you're going to be buying a battery or 2 every 1 to 3 months or so.

it's not like they are going to go gutsy for a long time and then suddenly go dead one day; they're going to get old, and ..... slow down..... gradually

What I do is draw a black ring round the bottom of each battery every year; so after 2 years a battery has 2 rings (or a thicker ring) so I know my older batteries from my newer ones (plus I get a better visual indicator for +/- battery terminals)
(I vape 10 watts)

In your case, at 85watts, marking once a month would be more practical.

 

[Grimwald]

If you are charging your batteries every 2 days from a mostly depleted condition then you could get 600-1000 days before they go totally dead. (300-500 charge cycles) However, long before that time you will begin to notice a decrease in life between charges. When they used to last all day, now they only last 2/3 of a day...that sort of thing. The real life of the battery will depend on how much decrease you will tolerate before you decide to recycle them.

 

[SpartanM]

I've heard about 300 charges too.

I came across a link for individual batteries

Battery test-review 18650 individual tests

hmm.. is that the longest they usually go?

the link doesn't work btw


-themaxster

 

[SpartanM]

if you're using 85 watts per battery I'm thinking you're going to be buying a battery or 2 every 1 to 3 months or so.

it's not like they are going to go gutsy for a long time and then suddenly go dead one day; they're going to get old, and ..... slow down..... gradually

What I do is draw a black ring round the bottom of each battery every year; so after 2 years a battery has 2 rings (or a thicker ring) so I know my older batteries from my newer ones (plus I get a better visual indicator for +/- battery terminals)
(I vape 10 watts)

In your case, at 85watts, marking once a month would be more practical.

thanks again edyle! and yeahh I was thinking they'd only last a few months at 85watts but I'll try that out when I get back home!


-themaxster

 

[SpartanM]

If you are charging your batteries every 2 days from a mostly depleted condition then you could get 600-1000 days before they go totally dead. (300-500 charge cycles) However, long before that time you will begin to notice a decrease in life between charges. When they used to last all day, now they only last 2/3 of a day...that sort of thing. The real life of the battery will depend on how much decrease you will tolerate before you decide to recycle them.

thanks Grimwald, that's a good point. I've started noticing that I need to bring a spare set in case I get stuck studying late at school. guess it's time to snag a new pair of those AWTs I've seen lately!


-themaxster

 

[Bunnykiller]

if you arent pushing the limits on the batteries, about 2 yrs

 

[Pearl B]

hmm.. is that the longest they usually go?

the link doesn't work btw


-themaxster

On the specifications for one of my batteries it said 300 was the average amount of recharges that could be expected. It's a number I've seen often when I've looked into this subject.

The link works when I click on it, works in the quote too. The link is in the title below:

Battery test-review 18650 individual tests

 

[nyiddle]

Yep, 300-500 charge cycles is the recommended amount. 500 cycles would probably only be feasible if you were really .... about your batteries, charging them virtually as soon as possible and taking them off the charger right before they reach 4.2V.

The mAh dropoff is somewhat noticeable after a year, in my opinion. The batteries just don't seem to last as long once they get close to 300 charge cycles. Just to be safe I replace my 2 pairs once a year, which only amounts to about $20/year. Worth it for the peace of mind.

 

[Baditude]

guess it's time to snag a new pair of those AWTs I've seen lately!

Not a 30 amp battery as advertised; only 20 watt CDR batteries in real life.

AWT Purple 40A 2600mAh 18650
AWT 40A 2600mAh 18650 Bench Test Results...only 20A/2500mAh, might be a 25R2

AWT Yellow 40A 2600mAh 18650
AWT Yellow 40A 2600mAh 18650 Bench Test Results...only a 20A battery

If you're below 60W or so then the Samsung 30Q or LG HG2 are your best choices in my opinion. Enjoy the longer vaping time before needing to recharge.

Above 80 watts, probably some Sony VTC4.

 

[SpartanM]

Not a 30 amp battery as advertised; only 20 watt CDR batteries in real life.

AWT Purple 40A 2600mAh 18650
AWT 40A 2600mAh 18650 Bench Test Results...only 20A/2500mAh, might be a 25R2

AWT Yellow 40A 2600mAh 18650
AWT Yellow 40A 2600mAh 18650 Bench Test Results...only a 20A battery

If you're below 60W or so then the Samsung 30Q or LG HG2 are your best choices in my opinion. Enjoy the longer vaping time before needing to recharge.

Above 80 watts, probably some Sony VTC4.

Thank Baditude! i was wag actually looking for the red AWTs rated for 40amps 3000mah? idk if they're the same as the AWTs they bench tested. Can't seem to find any sources selling them for less than $12-14 each though LOL. Also, there's a pretty high possibility they're overstating the ratings again :\


-themaxster

 

[nyiddle]

Thank Baditude! i was wag actually looking for the red AWTs rated for 40amps 3000mah? idk if they're the same as the AWTs they bench tested. Can't seem to find any sources selling them for less than $12-14 each though LOL. Also, there's a pretty high possibility they're overstating the ratings again :\


-themaxster

In general, I recommend avoiding these no-name mystery companies. MXJO, AWT, "Vappower".. They're all Chinese companies trying to make a quick buck by re-wrapping batteries and inflating their specs, selling them at a higher premium.

In reality, the day a true 40A CDR 18650 battery comes out, it will almost definitely be developed by a large company like Sony, LG, Samsung, or even (perhaps) Tesla, considering that these companies have been actually creating cells for a loooong time, which includes actually researching new/more efficient ways to make these cells work. Small companies like MXJO/AWT don't have the money (or, likely, scientists) to develop a new technology like a 40A CDR battery.

 

[SpartanM]

In general, I recommend avoiding these no-name mystery companies. MXJO, AWT, "Vappower".. They're all Chinese companies trying to make a quick buck by re-wrapping batteries and inflating their specs, selling them at a higher premium.

In reality, the day a true 40A CDR 18650 battery comes out, it will almost definitely be developed by a large company like Sony, LG, Samsung, or even (perhaps) Tesla, considering that these companies have been actually creating cells for a loooong time, which includes actually researching new/more efficient ways to make these cells work. Small companies like MXJO/AWT don't have the money (or, likely, scientists) to develop a new technology like a 40A CDR battery.

Great point nyiddle! I was always skeptical about even 35A rated batteries, and 3000mah just seems absurd. And regarding big-name companies, I wouldn't be surprised if it comes out soon. With Tesla's R/D already investing in home battery systems, it's only a matter of time before they start investing in commercial and household products!


-themaxster