#### Bullzeyebill

##### Flashaholic

**Re: CPF Acronyms (NEWBS/NOOBS, Look Here!)**

You are correct.

Bill

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- Thread starter angelofwar
- Start date

Help Support Candle Power Flashlight Forum

You are correct.

Bill

- Joined
- Mar 30, 2015

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Thank you, now i'm one step above complete newbie!

- Joined
- Sep 27, 2015

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Still reading....still learning. Thanks for the lessons! Will be happy when I'm no longer a NOOB!

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- Oct 10, 2013

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Thanks for all this info! Now i can start talking flashlights!

One term that I see thrown around a lot, especially among builders and modders is "pill".

Now I think I know what it means, but I also believe in the ancient Chinese proverb, "Far better to remain silent and let people think you a fool, than to open one's mouth and remove all doubt".

Would someone more knowledgeable care to illuminate?

Mahalo

These are not really acronymins, but maybe add a few electric abbreviations / terms:

mAh = milliampere-hour

An ampere-hour or amp-hour (SI symbol A·h or A h; also denoted Ah) is a unit of electric charge, equal to the charge transferred by a steady current of one ampere flowing for one hour, or 3600 coulombs.[1]

The ampere-hour is frequently used in measurements of electrochemical systems such as electroplating and electrical batteries. The commonly seen milliampere-hour (mA·h or mAh) is one-thousandth of an ampere-hour (3.6 coulombs).

Wh

The watt-hour (symbolized Wh) is a unit of energy equivalent to one watt (1 W) of power expended for one hour (1 h) of time. The watt-hour is not a standard unit in any formal system, but it is commonly used in electrical applications. An energy expenditure of 1 Wh represents 3600 joules (3.600 x 103 J).

For example to get the total cell energy capacity in terms of mAh, multiple mAh * voltage, i.e. 4.2V * 3500 mAh

Or get it in watt-hours, just divide by 1,000:

Wh = mAh × V / 1000

http://www.rapidtables.com/convert/electric/mah-to-wh.htm

Wh

The watt-hour (symbolized Wh) is a unit of energy equivalent to one watt (1 W) of power expended for one hour (1 h) of time. The watt-hour is not a standard unit in any formal system, but it is commonly used in electrical applications. An energy expenditure of 1 Wh represents 3600 joules (3.600 x 103 J).

http://www.rapidtables.com/convert/electric/mah-to-wh.htm

Actually, the watt-hour is pretty standard. I see it on my electric bill all the time in the in the form of the Kilowatt-hr, or KWh.

The watt is a measure of electrical power and (if I remember correctly from my days working at an electrical engineering company), it is calculated as follows:

W = V x I x PF

Where: W = watts V = volts I = current (in Amperes) PF = Power Factor

Power Factor (PF) comes into play when voltage and current are out of phase. In the case of DC power systems, the voltage and amps (current) are always in phase, so for the purpose of these discussions, Watts(W) and VoltAmps(VA) are interchangeable.

Where: W = watts V = volts I = current (in Amperes) PF = Power Factor

Power Factor (PF) comes into play when voltage and current are out of phase. In the case of DC power systems, the voltage and amps (current) are always in phase, so for the purpose of these discussions, Watts(W) and VoltAmps(VA) are interchangeable.

BTW, as I stated earlier, the Watt is a measure of electrical power. To put this into perspective, HP (HorsePower) is a measure of mechanical power. There are conversion tables to convert one to the other. 1 BHP is equivalent to approximately .75 KW.

I suspect that part of the reason most batteries don't list Watt-hours or VA-hours is because the cell voltage is fairly common knowledge, making it a common denominator.

Mahalo

I'm not 100% sure on this but I think it's "proportional integral derivative" a type of thermal controller.PID - Not anywhere on this thread. Should be in first post.

http://newatlas.com/ip67-ip68-water-resistance-guide/47927/

- Joined
- Dec 30, 2016

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am trying to figure out what "Kcd" stands for? Sorry for the newbie question... but just ordered a TN42 and read somewhere about someone had a 750Kcd ???

Cannot find the def anywhere... or did I plainly miss it, if so, my apologies.

Thanks!

The k in kcd = 1000, Cd is a measurement of light = candela. So 750kcd = 750 thousand candela. Pretty bright.

Bill

Bill

Last edited:

Ron

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The k in kcd = 1000, Cd is a measurement of light = candela. So 750kcd = 750 thousand candela. Pretty bright.

Bill

- Joined
- Jan 20, 2017

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Understood most of it but it’s nice to have this laying around on my desk.

Thanks!