1src Forums - Any Idea why NZ battery is 3.7v

01-17-2004, 04:07 PM	#1
duc748_bip Registered User Join Date: Oct 2003 Location: LA Posts: 107	Any Idea why NZ battery is 3.7v Other "high-end" clie use 5.2v __________________ Palm: III, m505, UX-50. PPC: Hx4700, HTC exec, H6315, Q Symbian: 9500 Magic Cap : PIC-1000 :D DISCLAIMER: This message may contain several of the following elements; sarcasm, humor, slapstick, harmless jabs, comical insults, and other similar elements. If you are easily offended or over-sensitive, please refrain of reading any of my threads or posts with the exception of those specifically labeled (SERIOUS) at the begginning of the post.

01-17-2004, 05:43 PM	#2
DanT TH55 Nutcase member Platinum Contributor Join Date: Jul 2002 Location: 29°4'N/95°27'W Posts: 5,804	I think you are comparing apples with oranges. Charging voltage and the battery voltage are two different things. For example, my N760C charging voltage is 5.7 VDC, but the battery will say it is full (100%) any voltage between 4.2 to 3.9 VDC. There is a circuitry built in the Clie to stop charging the battery once it reach 4.2VDC. The charging voltage needs to be higher than the battery voltage so you can drive the electric charges from the charger to the battery, sort of like pouring water from one cup to another. You need the charging cup to be in higher place that the receiving cup. The newer models have lower charging voltage (5.2VDC), but I don't know what is the battery voltage range when it is in full state. __________________ Vx, M500, N760P, NX70V/U, NX73V/U, NZ90/U, SL10/U, SJ30/U, T415, T615C, TJ25/U, TJ27/U, TJ35/E1, TH55/U, TH55/E1, TH55/E2, UX40/U, UX50/U, UX180P, iPhone, iPhone3G

01-18-2004, 05:06 AM	#3
anitanium anitanium contributer Join Date: Oct 2003 Location: Vancouver, Canada Posts: 1,385	i'm not sure what other "high end" clie's you are speaking of but the voltage does not really matter. its the current that keeps the clie going and going and going and going... __________________ back with a vengeance --Pa1m0ne Treo 600

01-18-2004, 05:20 AM	#4
BMEngineer SE S700 Join Date: Sep 2003 Location: Singapore Posts: 1,034	The voltage drives the current....Remember the formula : Voltage=Current * Resistance. __________________ Past: T3 Now: NX80 Future: S700??? Visit my website for the latest gadgets! www.techtradings.com

01-19-2004, 07:01 PM

duc748_bip

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Quote:

Originally posted by BMEngineer
The voltage drives the current....Remember the formula :
Voltage=Current * Resistance.

Yep that is what i remember from High school.
compare to NR, NX the Battery voltage is 5.2v.
But the NZ's replaceable battery is 3.7v.
They all have big screen and fast precessor. No wonder the NZ feel underpowered.
remember it will take more current and time to charge the flash capacitor with a lower voltage.

__________________
Palm: III, m505, UX-50.
PPC: Hx4700, HTC exec, H6315, Q
Symbian: 9500
Magic Cap : PIC-1000 :D
DISCLAIMER: This message may contain several of the following elements; sarcasm, humor, slapstick, harmless jabs, comical insults, and other similar elements. If you are easily offended or over-sensitive, please refrain of reading any of my threads or posts with the exception of those specifically labeled (SERIOUS) at the begginning of the post.

01-19-2004, 07:27 PM	#6
BMEngineer SE S700 Join Date: Sep 2003 Location: Singapore Posts: 1,034	But how much current is stated behind your NZ? __________________ Past: T3 Now: NX80 Future: S700??? Visit my website for the latest gadgets! www.techtradings.com

01-19-2004, 08:10 PM	#7
anitanium anitanium contributer Join Date: Oct 2003 Location: Vancouver, Canada Posts: 1,385	yes the 1200mAh is quite the devil __________________ back with a vengeance --Pa1m0ne Treo 600

01-19-2004, 08:17 PM	#8
BMEngineer SE S700 Join Date: Sep 2003 Location: Singapore Posts: 1,034	NX is only about 1A. __________________ Past: T3 Now: NX80 Future: S700??? Visit my website for the latest gadgets! www.techtradings.com

01-20-2004, 05:42 AM	#9
binaryDigit Registered User Join Date: Oct 2003 Posts: 46	mAh says nothing of the number of amps the Clie itself draws. 1200mAh simply says that the battery can supply 1.2 amps for 1 hour (or .6amps for 2hours, etc). One can make assumptions about power draw based on how long the battery lasts. But what should be obvious is that the Clie draws different amounts of current depending on what it's doing (that flash sucks that current bigtime). As to why the NZ uses a 3.7v battery, I assume it's because it only needs around 3v to run most everything inside the Clie. They could have gone with a 5v battery, but remember the formula P=IE, where P = power, I = current (amps) and E = voltage. So given two identical batteries (i.e. both capable of storing the same amount of energy/power), if you deliver that power at a lower voltage, then you can deliver more current, or if the current is constant, you can sustain that current over a longer period of time. So, the answer to the original poster is that the NZ battery is 3.7v to help extend battery life over a similarly capable 5.2v battery.