Author Topic: Custom battery pack  (Read 12517 times)

V-Man

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Custom battery pack
« Reply #30 on: November 23, 2004, 09:56:21 pm »
Unfortunately, you don't get 7.2 AmpHours with 4 1.8 Amphour batteries in parrallel.  You only get 1.8 (but at a higher voltage: 5.34 v 1.2).  If you wire them in series you will get 7.2, but at only 1.2 volts.  

Anyway, I get about four hours of use with backlight on full and intermittent use of WiFi card.  My batteries are not as high capacity as yours and are several years old now, so you should get slightly better use time from yours.  I also made two packs with AAA batteries.  These are about the same capacity as the Z's internal battery, but are very small and easy to cart around.  Did you find the instructions for making the battery packs I made?  If not, let me know and I'll email or pm it to you.

V-Man
SL5500 w/Sharp ROM 3.10
Netgear MA701 WiFi
Sharp  CE-AG06 Camera Card
Various memory cards
Various homemade power/battery packs
HP 2215 iPAQ

woverin

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Custom battery pack
« Reply #31 on: November 24, 2004, 07:02:04 am »
Thanks macz for the nice mod.
I've seen PeakCloudy's battery extender on ebay. I just wondering how to connect a LED Power Indicator on that kind of battery pack. Should I put an R between led and battery pack ? If anyone have this battery pack, could you please take a pix inside?  

V-Man

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Custom battery pack
« Reply #32 on: November 24, 2004, 10:03:40 pm »
There are some 5 or 6 volt LED's out there.  Most are 1.5v (I think) and require a resitor in series with the LED to lower the voltage to what the LED requires.  I think the 5, 6, and 12 Volt LED's are just a package assembly with the correct resistor included.  You would wire the LED package (LED and resitor in series) parallel with the power output after the power switch.  If you wire them in series, you will lower the voltage of power output.  Am I confusing you enough yet?  I can send you some schematics that may be easier to understand if you want.
SL5500 w/Sharp ROM 3.10
Netgear MA701 WiFi
Sharp  CE-AG06 Camera Card
Various memory cards
Various homemade power/battery packs
HP 2215 iPAQ

woverin

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Custom battery pack
« Reply #33 on: November 25, 2004, 05:00:34 am »
Quote
There are some 5 or 6 volt LED's out there.  Most are 1.5v (I think) and require a resitor in series with the LED to lower the voltage to what the LED requires.  I think the 5, 6, and 12 Volt LED's are just a package assembly with the correct resistor included.  You would wire the LED package (LED and resitor in series) parallel with the power output after the power switch.  If you wire them in series, you will lower the voltage of power output.  Am I confusing you enough yet?  I can send you some schematics that may be easier to understand if you want.
Thanks V-Man for your promptly reply
I'd love to see the schematics.

matrix

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Custom battery pack
« Reply #34 on: November 25, 2004, 11:58:26 am »
Quote
Unfortunately, you don't get 7.2 AmpHours with 4 1.8 Amphour batteries in parrallel.  You only get 1.8 (but at a higher voltage: 5.34 v 1.2).  If you wire them in series you will get 7.2, but at only 1.2 volts.
This is backwards.  Wiring 4 - 1.8ah 1.2v in parallel gives you a single 7.2ah 1.2v power source.  wiring the same batteries in series provides a single 1.8ah 4.8v source.

V-Man

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« Reply #35 on: November 29, 2004, 04:42:10 pm »
oops
SL5500 w/Sharp ROM 3.10
Netgear MA701 WiFi
Sharp  CE-AG06 Camera Card
Various memory cards
Various homemade power/battery packs
HP 2215 iPAQ

V-Man

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Custom battery pack
« Reply #36 on: December 01, 2004, 05:35:09 pm »
Work's being a pain right now (first time assigned to day shift in 11 years).  I will provide a link to some schematics over the weekend.  Sorry for the delay.
SL5500 w/Sharp ROM 3.10
Netgear MA701 WiFi
Sharp  CE-AG06 Camera Card
Various memory cards
Various homemade power/battery packs
HP 2215 iPAQ

t0xa

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Custom battery pack
« Reply #37 on: May 05, 2006, 04:23:54 am »
Hi everyone,

It's seem it's been a while since last post here. Can someone who has used these battery packs share their personal experience?