1src Forums - simple and cheap extended battery

02-10-2005, 02:31 PM

#31

JAmerican

Why Does Palm Disappoint?

Join Date: Aug 2004

Posts: 5,909 JAmerican will become famous soon enough

Quote:

Originally Posted by antoinepierre

I have this one, very nice but very big !

Could you take a comparitive pic of the Battery Extender and the UX.

Thanks

JAmerican

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JAmerican

Handspring Treo 90 --> Royal RG135nx --> T-Mobile Sidekick --> T-Mobile Sidekick Color --> PEG-UX40 -- > PEG-UX50--> Samsung T629 (Returned) -- > Palm TX (SOLD)/T-Mobile Sony Ericsson T610(Defective) --> T-Mobile Dash(Broken Screen) --> ASUS EEE 1000H Black/Treo 800w/PEG-VZ90

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02-10-2005, 07:47 PM

#32

rcxAsh

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Quote:

Originally Posted by djboa

well, there is no electronics in the usb charging cradle that cuts off the usb voltage when the battery is full .... so if you have the guts to use the usb cradle as is, this is pretty much the same ...

and connecting the batteries after each other in series with the points in the bottom of the ux should work, just be sure you are doing it to the correct points!

From what I gather from a couple of JAmerican's pictures (thanks JAmerican), it looks like there's a small transformer arrangement inside the standard JC40 charger cradle (You know, you wrap wires a certain amount of times around a round magnet, then on the other side, you wrap more around a different number of times.. steps the current/voltage up/down IIRC from physics). So this is not needed anymore...?

Looking at the bottom of the JC40, it says, 2000mA. The UX40, however, only says 1A. This is not a problem if I connect my batteries directly to the UX40? (This is different from the mAh that was discussed earlier, no? Eg, the car battery example).

Has anyone tried the direct method of connecting the series of batteries to the bottom of the UX yet?

I need to see if I can find any wires that I can use to try this... also need to find the time and the guts to connect something to my UX40 that I put together myself...

Please do excuse my ignorance..

__________________
/* rcxAsh */
SJ20 ..> TG50 + WiFi MS ..> UX40 + SGH-E730 ..> SE P990i ..> Lifebook T4010D + Nokia 5800 XM
Let's hope that's the end for me...

02-10-2005, 07:55 PM	#33
SonyStyle Clie Fanatic Join Date: Jun 2004 Posts: 1,978	there should be a battery extender competition to see who has the best design. __________________ Currently Own: UX50/U, TH55/U, NX70V/U, NZ90/U, Sony PSP, ipod vid 30GB Motorola RAZR V3, Nokia 8801

02-10-2005, 10:03 PM

#34

JAmerican

Why Does Palm Disappoint?

Join Date: Aug 2004

Posts: 5,909 JAmerican will become famous soon enough

Quote:

Originally Posted by SonyStyle

there should be a battery extender competition to see who has the best design.

Then out of all I've seen so far, the talented Hippo won.

JAmerican

02-11-2005, 02:49 AM

#35

antoinepierre

BarBoy

Join Date: Nov 2004

Location: Fontainebleau, FRANCE.

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Quote:

Originally Posted by JAmerican

Could you take a comparitive pic of the Battery Extender and the UX.

Sorry, I've only a old camera, with a film, not a digital camera.
If you want, I can give you the size of this battery extender.
EDIT : Here's the result : 14.5 x 4.8 x 2.0 cm.
compared to UX : 10.0 x 8.5 x 1.7 cm

For the beauty contest

, my opinion :
- last : surplusPDA, the cheapest.
- third : semsons with flashlite.
- second : boxwave.
- first : this semsons.

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Last edited by antoinepierre : 02-11-2005 at 03:15 PM.

02-13-2005, 04:34 AM	#36
siskodata Registered User Join Date: Feb 2005 Posts: 27	Hi my first post in this forum. Ever heard of Columbus’ egg? Well after seeing djboa’s obvious simple and great idea I banged my head on the wall for not having the idea myself. I was looking to make some kind of battery backup for the power hungry UX50. I just wanted to show you my version all merits still go to djboa. What I used 1 Brando case with USB charging socket 1 Flat 4 AA battery holder 4 2300mAh 1.2Volts Ni-MH AA batteries 1 USB cable extension (from my USB memory pen which I never used) Super Glue Hot glue gun As you can see from the photos it isn’t pretty but its cheap and works fine. I first used some super glue to fix the socket to the battery holder then I used the hot glue for protection, insulation and added strength. The hot glue isn’t good to be shaped but you can use some epoxy acrylic adhesive which you can then sand to a perfect shape. The plus for using the USB socket is that it can be used for any USB powered device and I didn’t want to sacrifice the UX50 USB cable. The flat battery holder could be attached to the Brando case from below with some adhesive Velcro and with the use of the Brando retractable USB cable which I think can also be attached to the case with some Velcro you get a bit large but compact extra battery pack. That’s all and thanks again to djboa for the great idea. Attached Thumbnails Last edited by siskodata : 02-13-2005 at 04:39 AM.

02-13-2005, 01:46 PM	#37
sam45 Guest Posts: n/a	I tried connecting a battery pack via wires directly to the back of the clie. The clie did not charge from this connection. My ux50 will no longer charge when placed on the charger cradle. I took the battery out and it still works and my cradle also works. I also did a hard reset and other things and still the clie will not charge I even replaced the battery with a new one and it will still not work. my palm is at 20 percent battery right now and everything works but when it dies I will have to buy a new ux50. Any ideas on how to fix this or do I just buy a new one which I would not mind doing?

02-13-2005, 02:47 PM	#38
JAmerican Why Does Palm Disappoint? Join Date: Aug 2004 Posts: 5,909	I tried the same thing and I think my device might not be able to charge either. I have to wait until my leather charger cradle comes to test it out. If it doesn't charge, I might have to do the USB power setup. Hopefully that will work. JAmerican __________________ JAmerican Handspring Treo 90 --> Royal RG135nx --> T-Mobile Sidekick --> T-Mobile Sidekick Color --> PEG-UX40 -- > PEG-UX50--> Samsung T629 (Returned) -- > Palm TX (SOLD)/T-Mobile Sony Ericsson T610(Defective) --> T-Mobile Dash(Broken Screen) --> ASUS EEE 1000H Black/Treo 800w/PEG-VZ90 Accesories: Transcend 16GB SDHC \| 8GB Transcend microSD

02-13-2005, 05:33 PM	#39
rcxAsh Do you Gentoo? Join Date: Nov 2002 Location: GTA/Waterloo Posts: 1,315	I'm wondering if that has to do because of the difference in current? I notice that the UX says 1A on the back of it.. So the cradle must step this down. __________________ /* rcxAsh / SJ20 ..> TG50 + WiFi MS ..> UX40 + SGH-E730 ..> SE P990i ..> Lifebook T4010D* + Nokia 5800 XM Let's hope that's the end for me...

02-13-2005, 05:43 PM	#40
JAmerican Why Does Palm Disappoint? Join Date: Aug 2004 Posts: 5,909	Whatever it is. I hope I can charge my device once my new cradle comes. JAmerican __________________ JAmerican Handspring Treo 90 --> Royal RG135nx --> T-Mobile Sidekick --> T-Mobile Sidekick Color --> PEG-UX40 -- > PEG-UX50--> Samsung T629 (Returned) -- > Palm TX (SOLD)/T-Mobile Sony Ericsson T610(Defective) --> T-Mobile Dash(Broken Screen) --> ASUS EEE 1000H Black/Treo 800w/PEG-VZ90 Accesories: Transcend 16GB SDHC \| 8GB Transcend microSD

02-13-2005, 06:25 PM	#41
djboa Registered User Join Date: Nov 2004 Location: denmark Posts: 141	you don't step current up or down, voltage yes ... and the cradle does not step anything down ... at least not how I understand hippo's schematic, or the workings of the usb cradle which points on the back did you try to connect to? asking since hippo is modifying a voltage sensor input designed for 3.6-4.2V, and charging through that ... if you are using this point without the modifications ... but if you are using the 5v input point with the battery ... then I am at a loss for words ... just checked the usb cradle: usb cable - voltage at pins 5.36V batteries freshly charged - voltage at pins 5.33V batteries freshly charged - voltage at batteryholder 5.33V when looking down at the charger with the pins in the front the pinout is: ground \| not connected \| not connected \| 5v will it still work with an unoriginal charger ... depends, cross your fingers ...

02-13-2005, 07:05 PM

#42

rcxAsh

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Quote:

Originally Posted by djboa

you don't step current up or down, voltage yes ... and the cradle does not step anything down ... at least not how I understand hippo's schematic, or the workings of the usb cradle...

Sorry, my mistake there..

I think what I meant to be saying was that it looks like there's a transformer in the JC40. This is what I gather from looking at hippo's pictures of his work. Particuraly these two pictures of the insides of the JC40 charger cradle:
http://photobucket.com/albums/v95/t...ent=Board1a.jpg
http://photobucket.com/albums/v95/t...=PEGA-JC40K.jpg

That ring looks like a magnet to me. And IIRC, aren't current and voltage inversly proportional? Trying to remember, but it's fuzzy in my mind. So stepping up voltage decreases current and vice versa?

Though, I am begining to question why I started wondering about this in the first place. Am I making any sense?

However, looking at the pictures again, it looks like the wires are twisted only on one side of the magnet.

Anyways... I am probably way out of my league here.

But FWIW and IIRC, more current increases resistance, correct? Not sure if this would have anything to do with it anymore...

__________________
/* rcxAsh */
SJ20 ..> TG50 + WiFi MS ..> UX40 + SGH-E730 ..> SE P990i ..> Lifebook T4010D + Nokia 5800 XM
Let's hope that's the end for me...

02-13-2005, 07:11 PM	#43
JAmerican Why Does Palm Disappoint? Join Date: Aug 2004 Posts: 5,909	Do you think sometihng could have short-circuited? JAmerican __________________ JAmerican Handspring Treo 90 --> Royal RG135nx --> T-Mobile Sidekick --> T-Mobile Sidekick Color --> PEG-UX40 -- > PEG-UX50--> Samsung T629 (Returned) -- > Palm TX (SOLD)/T-Mobile Sony Ericsson T610(Defective) --> T-Mobile Dash(Broken Screen) --> ASUS EEE 1000H Black/Treo 800w/PEG-VZ90 Accesories: Transcend 16GB SDHC \| 8GB Transcend microSD

02-13-2005, 07:20 PM	#44
djboa Registered User Join Date: Nov 2004 Location: denmark Posts: 141	a magnet used in that configuration is not a transformer, its somewhat like a low pass filter ... think of it as cleaning the supply ... remembering back to physics ... 15 years back ... P=U x I where P is watts, U is voltage and I is current ... explains why you sometimes see W, and sometimes VA ... so yeah there is a connection ... but in my mind it something like you supply the voltage and the subject pulls however much current it needs, determining the wattage. a rating on a piece of equipment is how much it will use given a correct voltage a rating on a wallwart or other powersupply is more like a guide of how much you can suck out of it before it burns up ...

02-13-2005, 07:23 PM	#45
djboa Registered User Join Date: Nov 2004 Location: denmark Posts: 141	jamerican, i think you either reversed the polarity and fried the charging circuit ... or connected to a wrong pin and fried something else that has to do with the charging circuit ...