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 Posted: Mon, 21st Nov 2022 19:01 Post subject: Noob question: Charging 9V Battery with 5V or 12V |
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So I lost my Vaporizer charger, it is a standard 9V 1A charger but with a very rare DC plug.
I got a fitting DC plug adapter so now a variety of chargers work with the Vaporizer.
The problem is, all the chargers I got are either 12V 1.5A or 5V.
I plugged it in to the 5V and it did nothing. With the 12V 1.5A it appears to charge fine but I don't want to kill it accidentally.
What would happen if I try to charge with 12V? It has 2x2600mah Lithium batteries.
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| Posted: Mon, 21st Nov 2022 19:08 Post subject: |
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Last edited by paxsali on Thu, 4th Jul 2024 23:00; edited 2 times in total
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Stige
Posts: 3544
Location: Finland
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| Posted: Mon, 21st Nov 2022 19:18 Post subject: |
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12V will work fine, I have charged 7.2V batteries with 12V car charger.
EDIT: Corrected 5V to 7.2V
Last edited by Stige on Mon, 21st Nov 2022 23:11; edited 1 time in total
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Nalo
nothing
Posts: 13516
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| Posted: Mon, 21st Nov 2022 19:52 Post subject: |
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Last edited by Nalo on Wed, 3rd Jul 2024 05:35; edited 3 times in total
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DXWarlock
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Posts: 11422
Location: Florida, USA
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| Posted: Mon, 21st Nov 2022 20:48 Post subject: |
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Don't ever try to charge/run electronics with higher voltage than the device requires. Either you will let the smoke out of the electronics, the batteries or at best case MAJORLY reduce the life of the batteries if somehow it doesn't pop something as you are 'reverting'[not the right term but understandable] the chemical reaction that holds charge, faster than it would at minimum degradation..
It might have a built in voltage dropper protector, but I would not bet the device on it hoping it did. As cannot see a vape device having that extra cost built into the board for a device with a dedicated charger.
You might be getting lucky the 9v charger was more beefy and didn't have as much voltage drop, dropping to 8ish across the load. And the 12v you have less beefy/robust and has a 2-3 volt drop over low omh loads dropping to around 10v.
(Voltage under load always drops from the open circuit measurement). Problem would come when it's near fully charged, and the load is less it will creep back toward 12v if this is the case.
Voltage is how hard it 'pushes'. Resistance is how hard it resists that push, and amperage is how much those two allow to be pushed through.
So if you double the voltage, at a set resistance you are pushing twice the wattage (V*A = W, if you double V you double W) through the device and batteries. Many devices are built around a voltage and the components not rated for that many amps due to higher voltage pushing 'more' though.
@Stige
Not sure what you did stige, but either there was a built in voltage dropper, or it wasn't 5v batteries or something.
-We don't control what happens to us in life, but we control how we respond to what happens in life.
-Hard times create strong men, strong men create good times, good times create weak men, and weak men create hard times. -G. Michael Hopf
Disclaimer: Post made by me are of my own creation. A delusional mind relayed in text form.
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tonizito
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Posts: 51409
Location: Portugal, the shithole of Europe.
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| Posted: Mon, 21st Nov 2022 21:19 Post subject: |
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| Nalo wrote: | | Don't listen to stige watt-ever you do |
This.
Dunno with modern batteries, but using those 12v instead of 9V while you haven't fucked it up already I'd say you're on your way to killing it.
| boundle (thoughts on cracking AITD) wrote: | | i guess thouth if without a legit key the installation was rolling back we are all fucking then |
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| Posted: Mon, 21st Nov 2022 21:21 Post subject: |
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| paxsali wrote: | | Why would anyone in this forum try to kill you? |
To get the achievement that rules his death as accidental
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Stige
Posts: 3544
Location: Finland
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| Posted: Mon, 21st Nov 2022 23:08 Post subject: |
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| DXWarlock wrote: | Don't ever try to charge/run electronics with higher voltage than the device requires. Either you will let the smoke out of the electronics, the batteries or at best case MAJORLY reduce the life of the batteries if somehow it doesn't pop something as you are 'reverting'[not the right term but understandable] the chemical reaction that holds charge, faster than it would at minimum degradation..
It might have a built in voltage dropper protector, but I would not bet the device on it hoping it did. As cannot see a vape device having that extra cost built into the board for a device with a dedicated charger.
You might be getting lucky the 9v charger was more beefy and didn't have as much voltage drop, dropping to 8ish across the load. And the 12v you have less beefy/robust and has a 2-3 volt drop over low omh loads dropping to around 10v.
(Voltage under load always drops from the open circuit measurement). Problem would come when it's near fully charged, and the load is less it will creep back toward 12v if this is the case.
Voltage is how hard it 'pushes'. Resistance is how hard it resists that push, and amperage is how much those two allow to be pushed through.
So if you double the voltage, at a set resistance you are pushing twice the wattage (V*A = W, if you double V you double W) through the device and batteries. Many devices are built around a voltage and the components not rated for that many amps due to higher voltage pushing 'more' though.
@Stige
Not sure what you did stige, but either there was a built in voltage dropper, or it wasn't 5v batteries or something. |
My bad it was 7.2V Makita batteries, not 5V.
The charger on my wheel alignment machine that was almost as old as me didn't charge few of the batteries really so this made them work enough to do one wheel alignment every time for almost a year before I gave up and bought new batteries for it.
Gave them 20-30sec of juice every time I started, lasted the whole 30-45min I needed every time.
And the charger wasn't exactly modern either, just one of those old metal boxes that output everything without second guessing what you plug it into. And yes I use it to charge car batteries all the time so it's not like it's bad or anything.
Perhaps using common sense is the key here and not leaving it on for a day.
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DXWarlock
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Posts: 11422
Location: Florida, USA
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| Posted: Tue, 22nd Nov 2022 02:08 Post subject: |
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Depends, the wattage would still be limited what a USB can do. So how quickly you want it to charge.
Its listed as:
Output Current: 1A(9V)
0.8A(12V)
Im suspect of those claims and I suspect it's not 3.1 or they would have it plastered all over the details. A USB 3.0, it can provide up to 900mA or 0.9A at 5V. Wattage is Volts * Amps. USB 3.0 can only do 5v * 0.9A or around 4.5 watts.
The 9 volt setting claims twice that (9V x 1A = 9 watts) and wattage is wattage, it can't be 'upped' by swapping V or A around. Its saying it can output 2x what the USB it is plugged into can output.
More realistic I would think of what it can do best case is 9V at around 0.4A [400mA] as step ups always have a loss.
So if you have a 2500 mAh battery it would take around 6-7 hours to charge from dead. (2500/400mA)
-We don't control what happens to us in life, but we control how we respond to what happens in life.
-Hard times create strong men, strong men create good times, good times create weak men, and weak men create hard times. -G. Michael Hopf
Disclaimer: Post made by me are of my own creation. A delusional mind relayed in text form.
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| Posted: Tue, 22nd Nov 2022 16:29 Post subject: |
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Last edited by paxsali on Thu, 4th Jul 2024 23:00; edited 2 times in total
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| Posted: Tue, 22nd Nov 2022 17:12 Post subject: |
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Most devices (well at least those which are not the cheapest Chinese shit) do have some DC/DC conversion at input instead of just accepting declared voltage. And since there are multiple types of DC/DC convertors (e.g. buck convertor) which have some input tolerance (because you also have a voltage drop on the cable), you may have luck to get it working with slightly higher voltage.
Plus you get increased current and faster charging (1A doesn't mean exactly 1A, it means at least 1A) which is dictated by the battery and PCB lines, until you push it too hard and things go boom.
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DXWarlock
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Posts: 11422
Location: Florida, USA
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| Posted: Tue, 22nd Nov 2022 17:33 Post subject: |
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@Guy_Incognito
That's true, but the vast majority of vape mods I have had are built to the cheapest cost, and do a % drop voltage of expected with no dynamic switching voltage chiplet on it. It's usually basic series resistor dropper (why they get warmish when charging, resistor is used to 'eat' some of the load).
The one I have now has no fancy buck dropper, its not a multi $100 one but wasn't cheap (geekvape one was around $90).
Measuring the leads when plugged in to USB, it's sending the straight 5v to the two batteries in series, that SHOULD charge at 4.2v. Which is fine, as the watt load on it being used will wear and tear them down faster than the extra ~0.5v. [after charge load drop].
It even tells you not to plug into a computer USB and to use the wall charger to power it for wired usage due to '"The amperage load may exceed the USB output" So it has no safety from under-ohming/over current the USB side either.
-We don't control what happens to us in life, but we control how we respond to what happens in life.
-Hard times create strong men, strong men create good times, good times create weak men, and weak men create hard times. -G. Michael Hopf
Disclaimer: Post made by me are of my own creation. A delusional mind relayed in text form.
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Stige
Posts: 3544
Location: Finland
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