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Offlinegopher
Coffee Bean Extraordinaire
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Registered: 11/22/17
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Last seen: 46 minutes, 5 seconds
who's a electronics guy or a math guy, I need help
    #28668316 - 02/20/24 03:02 PM (4 months, 3 days ago)

My friend won't let me charge my batteries, she says it costs $20 an hour and her landlord will kick her out

Can someone help me figure out the actually electricity my charger uses


I have the XTAR DRAGON VP4L charger

Input is 12 V 3A

Output is 4.2V x 4 slots 0.5A

I charge boyt 2450mAh AA batteries

And also 5000mAh 21700 batteries

And say it takes 6 hours to charge one battery for a numbers sake

How many watts or kilowatts to charge a AA??

How many watts or kilowatts to charge a 21700 battery?

I don't know electronics or math either so I need help


--------------------
For most of the normies out there, an operating system is just a bootloader for Google Chrome.

Since Disney has obtained tremendous value from the public domain, knows how important the public domain is, and is firmly determined to never contribute anything to it.

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OfflineCannabischarlie
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Re: who's a electronics guy or a math guy, I need help [Re: gopher]
    #28668319 - 02/20/24 03:04 PM (4 months, 3 days ago)

:goat:


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  we could all use a little more sunshine.

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Offlinespirit_shadow
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Registered: 08/15/11
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Re: who's a electronics guy or a math guy, I need help [Re: gopher]
    #28668321 - 02/20/24 03:04 PM (4 months, 3 days ago)

Ok so if your input is 12V  with 3 amps and the output is 4.2V then all you need to do is pretend you are hurt right outside your friends door and when they come out to help you just run inside, lock them out, and charge your batteries for free :ancientaliens:


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I'm so old school I don't even know what old school means.....(this account is automated, all posts related to illegal activities or advice thereof are strictly from numerous online sites and are for informational purposes only)- Circa 2011
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InvisibleJonBongGroovy
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Re: who's a electronics guy or a math guy, I need help [Re: Cannabischarlie] * 1
    #28668322 - 02/20/24 03:05 PM (4 months, 3 days ago)

$20 per hour??? I don't understand.


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Offlinegopher
Coffee Bean Extraordinaire
I'm a teapot


Registered: 11/22/17
Posts: 14,361
Loc: Canada
Last seen: 46 minutes, 5 seconds
Re: who's a electronics guy or a math guy, I need help [Re: JonBongGroovy] * 1
    #28668342 - 02/20/24 03:19 PM (4 months, 3 days ago)



--------------------
For most of the normies out there, an operating system is just a bootloader for Google Chrome.

Since Disney has obtained tremendous value from the public domain, knows how important the public domain is, and is firmly determined to never contribute anything to it.

My pronouns are He and Him, and my adjectives are Fat and Jazzy

:kratom:

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Offlinespirit_shadow
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Re: who's a electronics guy or a math guy, I need help [Re: gopher]
    #28668348 - 02/20/24 03:20 PM (4 months, 3 days ago)

Challenge them to combat. If you win you get to charge your shit for free. If they win you gotta pay $20. Street rules :micdrop:


--------------------
I'm so old school I don't even know what old school means.....(this account is automated, all posts related to illegal activities or advice thereof are strictly from numerous online sites and are for informational purposes only)- Circa 2011
Ban lotto

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Invisibleopenmind
curious
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Re: who's a electronics guy or a math guy, I need help [Re: JonBongGroovy]
    #28668379 - 02/20/24 03:42 PM (4 months, 3 days ago)

Quote:

gopher said:
My friend won't let me charge my batteries, she says it costs $20 an hour and her landlord will kick her out





Quote:

JonBongGroovy said:
$20 per hour??? I don't understand.





I don't understand either lol...

Gopher, how did your friend come up with the # that it will cost $20 an hour to charge some small batteries? That figure is soooo much higher than what it actually costs.

And why would using electricity be something that her landlord will kick her out for?




Just sounds so bizarre..."No you can't charge your batteries here, that costs $20 an hour and my landlord will kick me out"   

lol wut





-OM

.


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OfflineGene Hackman
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Re: who's a electronics guy or a math guy, I need help [Re: gopher]
    #28668393 - 02/20/24 03:48 PM (4 months, 3 days ago)

I ran it through chatGPT, so take this with a grain of lithium salt:

For four AA 1.5V 2450 mAh batteries:
Energy Input = Power × Time
= 36 W × 12 hours charging
= 432 Wh
= 0.432 kWh

For four 21700 3.7V 5000 mAh batteries:
Energy Input = Power × Time
= 36 W × 29.73 hours charging
= 1069.08 Wh
= 1.069 kWh

Assuming electricity is 28.6c/kWh, it should cost $0.43 in total to charge all eight batteries.

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Offlinegopher
Coffee Bean Extraordinaire
I'm a teapot


Registered: 11/22/17
Posts: 14,361
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Last seen: 46 minutes, 5 seconds
Re: who's a electronics guy or a math guy, I need help [Re: Gene Hackman]
    #28668407 - 02/20/24 03:51 PM (4 months, 3 days ago)

si=OOxOFFcQcvqf_QDj


--------------------
For most of the normies out there, an operating system is just a bootloader for Google Chrome.

Since Disney has obtained tremendous value from the public domain, knows how important the public domain is, and is firmly determined to never contribute anything to it.

My pronouns are He and Him, and my adjectives are Fat and Jazzy

:kratom:

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Offlineflugelizor
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Re: who's a electronics guy or a math guy, I need help [Re: gopher]
    #28668535 - 02/20/24 05:05 PM (4 months, 3 days ago)

Power = current x voltage
Input is 12 V 3A = 36Watts
This is less than a lightbulb.
An old incandescent light bulb is 60 Watts.

Is it a house? voltage of the charger should be 120AC, not 12DC.
Is your friend allowed to enjoy light?
:loldongs:

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InvisibleJonBongGroovy
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Re: who's a electronics guy or a math guy, I need help [Re: flugelizor]
    #28668536 - 02/20/24 05:07 PM (4 months, 3 days ago)

We're all confused by this situation.


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Offlinegopher
Coffee Bean Extraordinaire
I'm a teapot


Registered: 11/22/17
Posts: 14,361
Loc: Canada
Last seen: 46 minutes, 5 seconds
Re: who's a electronics guy or a math guy, I need help [Re: flugelizor]
    #28668538 - 02/20/24 05:09 PM (4 months, 3 days ago)

Yeah it's plugged into 120 outlet, but it says 12v Input in the writing in the plastic for input

She doesn't let me turn lights on unless I'm cooking or eating, she did but me a headlamp I'm allowed to use


--------------------
For most of the normies out there, an operating system is just a bootloader for Google Chrome.

Since Disney has obtained tremendous value from the public domain, knows how important the public domain is, and is firmly determined to never contribute anything to it.

My pronouns are He and Him, and my adjectives are Fat and Jazzy

:kratom:

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InvisibleCrazy_Horse
I’m Rick James, bitch!
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Posts: 13,901
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Re: who's a electronics guy or a math guy, I need help [Re: gopher]
    #28668557 - 02/20/24 05:26 PM (4 months, 3 days ago)

E=mc2


--------------------

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InvisibleGenericHero
crap dangit this sucks!


Registered: 07/07/20
Posts: 2,336
Re: who's a electronics guy or a math guy, I need help [Re: gopher] * 2
    #28668660 - 02/20/24 06:24 PM (4 months, 3 days ago)

Quote:

gopher said:
Yeah it's plugged into 120 outlet, but it says 12v Input in the writing in the plastic for input

She doesn't let me turn lights on unless I'm cooking or eating, she did but me a headlamp I'm allowed to use




She sounds high maintenance


--------------------
halfass mycology

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Onlinekoods
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Re: who's a electronics guy or a math guy, I need help [Re: GenericHero]
    #28668769 - 02/20/24 07:52 PM (4 months, 3 days ago)

4.2V .5 A is 2.1 watts. If it takes six hours that equals 12.6Wh per battery.

The average cost of electricity in Ontario is $.14 per kWh or $.00014 per Wh

So the cost is .00014 x 12.6 = $.0017 per battery.


--------------------
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“if I believed she was 16 I would become unattracted to her”

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Offlinechristopera
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Re: who's a electronics guy or a math guy, I need help [Re: koods] * 1
    #28668895 - 02/20/24 09:44 PM (4 months, 3 days ago)

Yeah it's damn near nothing to charge a battery, or even a few. It's way more expensive to buy single use batteries for sure.

$20 an hour would bankrupt just about anybody considering their electric stove or electric drier would pull 1000 times (just guessing) the amperage of that battery charger. Imagine a single window AC unit at those rates? It would be $1000 a day to operate.


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Offlinegopher
Coffee Bean Extraordinaire
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Registered: 11/22/17
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Last seen: 46 minutes, 5 seconds
Re: who's a electronics guy or a math guy, I need help [Re: christopera]
    #28669247 - 02/21/24 07:26 AM (4 months, 3 days ago)

Uggghhhh

My friend went to the gym this morning and left her phone

So I took her phone and to text messaged her landlord

I explained it uses 25 watt hours per battery or $0.006 per battery

Because of her last message to the landlord because of this the landlord is unsure

The landlord said she has to show it to the maintenance guy when he comes in

I'm living in crazy town, just let me charge my stupid batteries


--------------------
For most of the normies out there, an operating system is just a bootloader for Google Chrome.

Since Disney has obtained tremendous value from the public domain, knows how important the public domain is, and is firmly determined to never contribute anything to it.

My pronouns are He and Him, and my adjectives are Fat and Jazzy

:kratom:

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Offlinespirit_shadow
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Registered: 08/15/11
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Re: who's a electronics guy or a math guy, I need help [Re: gopher]
    #28669249 - 02/21/24 07:28 AM (4 months, 3 days ago)

Quote:

gopher said:
Uggghhhh

My friend went to the gym this morning and left her phone

So I took her phone and to text messaged her landlord

I explained it uses 25 watt hours per battery or $0.006 per battery

Because of her last message to the landlord because of this the landlord is unsure

The landlord said she has to show it to the maintenance guy when he comes in

I'm living in crazy town, just let me charge my stupid batteries



Should have went with my first idea. You would have charged batteries by now :lol:


--------------------
I'm so old school I don't even know what old school means.....(this account is automated, all posts related to illegal activities or advice thereof are strictly from numerous online sites and are for informational purposes only)- Circa 2011
Ban lotto

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InvisibleThe Blind Ass
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Re: who's a electronics guy or a math guy, I need help [Re: gopher]
    #28669284 - 02/21/24 07:59 AM (4 months, 3 days ago)

goph, go charge your batteries wherever you need to,
maybe somewhere without someone around who doesn't know wtf they're talking about confusing you as to how confused they are about their own utility bill.
you got this. :oldman:


--------------------
Give me Liberty caps -or- give me Death caps

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Offlinegopher
Coffee Bean Extraordinaire
I'm a teapot


Registered: 11/22/17
Posts: 14,361
Loc: Canada
Last seen: 46 minutes, 5 seconds
Re: who's a electronics guy or a math guy, I need help [Re: The Blind Ass]
    #28669336 - 02/21/24 08:36 AM (4 months, 3 days ago)

The landlord talked to the maintenance guy and said I can run the charger as long as I don't leave it unattended, so unplug it if we go out or overnight, they are afraid of it overheating, I didn't argue even though I charge at the smallest 0.5 amps to maximize life, it doesn't overheat unless you charge a NiMh at 1 amp or a lithium at 2amp


--------------------
For most of the normies out there, an operating system is just a bootloader for Google Chrome.

Since Disney has obtained tremendous value from the public domain, knows how important the public domain is, and is firmly determined to never contribute anything to it.

My pronouns are He and Him, and my adjectives are Fat and Jazzy

:kratom:

Extras: Filter Print Post Top
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