Battery Pack Question With USB Passthru

[Cellmeister]

So Cell, these USB Pass Throughs you are testing with, do they have a built in battery or not?

Houdini YES THESE ARE USB RECHARGEABLE BATTERY POWER PACKS

Sorry if I was Not Clear and I did not Intend ti insult anyone.

There are several ratings on how small batteries are Rated.

We Will Now Talk Briefly About a Small Lithium Ion Rechargeable Batteries Used In The Battery Packs for Using Our E-Cig USB Plug In Pass Throughs Units To A Battery Pack:

1) The Battery Size in mAh: ie 3400 mAh (Which is The Battery Capacity)

2) Voltage ie, Volts, there is Input (Input is What Is Needed To Recharge The Battery Pack) & Output (What is Going Out of The Battery)Voltages

3) Input & Output mAh is a Rating for the mAh (Do Not Confuse This With The Battery Size mAh. Input is What Is Needed To Recharge The Battery Pack and Output is What is Going Out of The Battery

4) Other: There are other components in the rechargeable battery packs, but that will be a different subject and is not really needed at this time.

Quick References:

mAh: milliampere-hour (mAh or mA·h) is one-thousandth of an ampere-hour or 3.6 coulombs

Voltage: Electrical tension (or voltage after its SI unit, the volt) is the difference of electrical potential between two points of an electrical or electronic circuit, expressed in volts

Ohms Law (Advanced Info):
Ohm's law applies to electrical circuits; it states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them. The mathematical equation that describes this relationship is:


Conclusion: For A USB Passthrough E-Cig Rechargeable Lithium Ion Battery Pack I can Suggest The Following:

1) A Rechargeable Lithium Ion Battery Pack With Standard Type USB Port
2) A Battery Size of at least 1800 mAH (Yes More is better)
3) 5 Volt Output (do not go higher)
4) 1000 mAH Output @ 5 Volts (at this time, you can go higher on mAh, do not go higher on voltage)
5) What is Used to Charge The Battery Pack, Suggest AC to DC Wall Adapter Type (when picking out one I would select one with the AC to DC Adapter type).

Using The Above Requirements, I do recommend a battery size of at least 1800 mAh or Higher. Due to the size & weight differences with Capacities, You would have to make your decision cuz it will be a personal preference. Again the larger the battery the longer it will last & opposite.

I know others will say less and / or more, everyone has their opinion, this is mine, from my knowledge, testing & experience. (I wrote this fast, if you see a mistake please let me know)

Hope This Really Helps!

Keep Vapin!

[yvilla]

Cell, now I'm begging you! Your #3 in the first list is still wrong. As is your #4 in the second list.

Take a look at any device you have hanging around, or take a look on the internet. Output is not measured in mAh! It's measured in mA (milliamps) or A (amps). Or sometimes even in watts. But never mAh! You'll see it if you only look. It will say mA or A on any device that lists its current output in amps or milliamps instead of watts.

[Cellmeister]

Cell, now I'm begging you! Your #3 in the first list is still wrong. As is your #4 in the second list.

Take a look at any device you have hanging around, or take a look on the internet. Output is not measured in mAh! It's measured in mA (milliamps) or A (amps). Or sometimes even in watts. But never mAh! You'll see it if you only look. It will say mA or A on any device that lists its current output in amps or milliamps instead of watts.

BUSTED! Damn!

From Wikipedia, the free encyclopedia

Jump to: navigation, search
An ampere-hour or amp-hour (symbol Ah , A·h, A h) is a unit of electric charge, with sub-units milliampere-hour (mAh) and milliampere second (mAs). One ampere-hour is equal to 3600 coulombs (ampere-seconds), the electric charge transferred by a steady current of one ampere for one hour.[1]
The ampere-hour is frequently used in measurements of electrochemical systems such as electroplating and electrical batteries.
The commonly seen milliampere-hour (mAh or mA·h) is one-thousandth of an ampere-hour or 3.6 coulombs. Small batteries (such as ones in laptops) are often rated in millampere-hours.
A milliampere second (mAs or mA·s) is a unit of measure used in X-ray diagnostic imaging and radiation therapy. This quantity is proportional to the total X-ray energy produced by a given X-ray tube operated at a particular voltage.[2] The same total dose can be delivered in different time periods depending on the X-ray tube current.
The Faraday constant is the charge on one mole of electrons and is approximately equal to 26.8 ampere-hours, and is used in electrochemical calculations.


Keep Vapin!

[Di]

now, trog and yvilla,

I am going to have to call the RSPCA if the 2 of you
do not stop flogging that horse !!!!!!!

Di .....

[Cellmeister]

OH I Forgot

The battery capacity that battery manufacturers print on a battery is the product of 20 hours multiplied by the maximum constant current that a new battery can supply for 20 hours at 68 F° (20 C°), down to a predetermined terminal voltage per cell. A battery rated at 100 A·h will deliver 5 A over a 20 hour period at room temperature. However, if it is instead discharged at 50 A, it will run out of charge before the 2 hours as theoretically expected.[48]
The symbol for a battery in a circuit diagram.

For this reason, a battery capacity rating is always related to an expected discharge duration.

t = \frac Q I[49]

where

Q is the battery capacity (typically given in mA·h or A·h).
I is the current drawn from battery (mA or A).
t is the amount of time (in hours) that a battery can sustain.

The relationship between current, discharge time, and capacity for a lead acid battery is expressed by Peukert's law. Theoretically, a battery should provide the same amount of energy regardless of the discharge rate, but in real batteries, internal energy losses cause the efficiency of a battery to vary at different discharge rates. When discharging at low rate, the battery's energy is delivered more efficiently than at higher discharge rates.[48]

In general, the higher the ampere-hour rating, the longer the battery will last for a certain load. Installing batteries with different A·h ratings will not affect the operation of a device rated for a specific voltage unless the load limits of the battery are exceeded. Theoretically, a battery would operate at its A·h rating, but realistically, high-drain loads like digital cameras can result in lower actual energy, most notably for alkaline batteries.[31] For example, a battery rated at 2000 mA·h may not sustain a current of 1 A for the full two hours.

LINK

So What Are We Vaping Tonight?

[Cellmeister]

Maybe Someone Should Start a Myth Busters Thread?

Please Keep Vapin Whatever Your Vapin, But If You Don't Share Your Vape, We Can't Vape The Same....

[ZambucaLu]

I is the current drawn from battery (mA or A).

But Cell, when we are talking 1000ma.....aren't we talking about this? The current drawn....the output....has to be 1000ma or 1a for them to work?

Lu

[wv2win]

My head now hurts!

[CandyGirl]

i have four USB devices rated 5v 1a output.
wall chargers and battery packs i purchased because i thought 5 volt 1 amp output would work. none of them do. i will, in the future, remember to ask if the passthrough being used already has a battery in it. my fault, i'm not blaming anyone.
it doesn't get my 90 dollars back though. lol.

[yvilla]

Cell, in your recent posts you are primarily talking about battery capacity.

What I am talking about is output of a battery pack or power source. Here is an example of the specs taken from a device much like the APC, that would in fact power our passthroughs:

Specifications:
Battery Capacity: 26.6Wh (most camcorder's standard batteries only have 5Wh~10Wh capacity. For example, Sony NP-FM50 battery is 8.5Wh, running 2~3 hours, this battery has 2.5 more times capacity, so it can run same camcorder up to 5~7 hours)
Battery Output Voltage: 5V
DC Output: 1500mA Max
Size: 5.2"x 3.1"x 0.6"
Weight: 275g

And here is the url: 5V Pocket-Size Lithium Battery Pack

The battery capacity is listed in watt hours, although many are indeed listed in millamp hours.

But the output is listed in milliamps (mA), as I've been trying to get across to you for so long. NOT mAh.

After this, I'm done. Keep on confusing people about the difference between the two if you want to.