Psp Power Brick!

[bam]

lso, for anyone who's interested, I just cracked open the case on my PSP power brick, and it is in fact a lithium ion cell with a small circuit board next to it. In my limited electronics knowledge I recognize a couple capacitors and a resistor or 2, and some very small microchips. If anyone wants pictures or model numbers of any of these I'm happy to oblige.


this is the overload protection circuit and possibly the charging circuit as well

[Storm]

How has everyone's pelican power bricks been holding up? My first one wasn't sealed properly.  It felt like it was going to come apart into 2 pieces, so I took it back to the store I bought it at and exchanged it for another one which though sealed perfectly well stopped working after only a couple weeks.  It makes a very faint high pitched "squealing" sound and the it only charges my Zaurus if I hold it at just the right angle, and then only for a few minutes or seconds at a time.  I never did get around to taking it back to the store I bought it at so I'm thinking about cutting it open and it least seeing what makes it tick.   Anyways, if everyone else has had good luck with these I'll probably buy another, because it's very useful for extended wlan usage on the 5500.

-John
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My experience is very hit or miss. I bought one from Best Buy and used it three times. The third time I used it, it ended up not charging the Z. I tried to take it back to Best Buy, and because it had been 2 months and they have a 30 day return policy, they said I was out of luck. I went back and bought another one, which didn't work, and bought a third one, which worked fine. I then returned the original one, and the new one has been working great.

As an aside, I would recommend against buying anything from best buy, as their return policy is yet another proof that profit outweighs customer satisfaction. Compare with the fact that I bought a Palm Tungsten E and extended warranty, and because of a high-pitched whine from the display. After 18 months, I was able to return it and even get the money back from the remainder of the extended warranty.

--Storm

[Cresho]

i have gone through  3 powerbricks.  the first one i droped and it broke.  the second one got lost.  this third one makes some very small noise but it works.  the second one i had gaved me no problems at all.  this new one ends up being okay.

strange huh

[Cresho]

How has everyone's pelican power bricks been holding up? My first one wasn't sealed properly.  It felt like it was going to come apart into 2 pieces, so I took it back to the store I bought it at and exchanged it for another one which though sealed perfectly well stopped working after only a couple weeks.  It makes a very faint high pitched "squealing" sound and the it only charges my Zaurus if I hold it at just the right angle, and then only for a few minutes or seconds at a time.  I never did get around to taking it back to the store I bought it at so I'm thinking about cutting it open and it least seeing what makes it tick.   Anyways, if everyone else has had good luck with these I'll probably buy another, because it's very useful for extended wlan usage on the 5500.

-John
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My experience is very hit or miss. I bought one from Best Buy and used it three times. The third time I used it, it ended up not charging the Z. I tried to take it back to Best Buy, and because it had been 2 months and they have a 30 day return policy, they said I was out of luck. I went back and bought another one, which didn't work, and bought a third one, which worked fine. I then returned the original one, and the new one has been working great.

As an aside, I would recommend against buying anything from best buy, as their return policy is yet another proof that profit outweighs customer satisfaction. Compare with the fact that I bought a Palm Tungsten E and extended warranty, and because of a high-pitched whine from the display. After 18 months, I was able to return it and even get the money back from the remainder of the extended warranty.

--Storm
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I found out that if the psp power cord or the powerbrick recieves alot of ressistance, it shuts down.

for the psp power cord, it will reset itself

for the powerbrick, simply plug it into the charger and then unplug it.  then plug it back into the zaurus and it works


the power brick shuts down on occasions and it must be "unlocked" by plugging it into a charger such as the zaurus sharp power cord ea-70 example.

they dont necesseraly break.  i noted this when i added a amprage meter to test the amp output.  they shut down and lock up.

[Meanie]

How has everyone's pelican power bricks been holding up? My first one wasn't sealed properly.  It felt like it was going to come apart into 2 pieces, so I took it back to the store I bought it at and exchanged it for another one which though sealed perfectly well stopped working after only a couple weeks.  It makes a very faint high pitched "squealing" sound and the it only charges my Zaurus if I hold it at just the right angle, and then only for a few minutes or seconds at a time.  I never did get around to taking it back to the store I bought it at so I'm thinking about cutting it open and it least seeing what makes it tick.   Anyways, if everyone else has had good luck with these I'll probably buy another, because it's very useful for extended wlan usage on the 5500.

-John
[div align=\"right\"][a href=\"index.php?act=findpost&pid=87772\"][{POST_SNAPBACK}][/a][/div]

My experience is very hit or miss. I bought one from Best Buy and used it three times. The third time I used it, it ended up not charging the Z. I tried to take it back to Best Buy, and because it had been 2 months and they have a 30 day return policy, they said I was out of luck. I went back and bought another one, which didn't work, and bought a third one, which worked fine. I then returned the original one, and the new one has been working great.

As an aside, I would recommend against buying anything from best buy, as their return policy is yet another proof that profit outweighs customer satisfaction. Compare with the fact that I bought a Palm Tungsten E and extended warranty, and because of a high-pitched whine from the display. After 18 months, I was able to return it and even get the money back from the remainder of the extended warranty.

--Storm
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I found out that if the psp power cord or the powerbrick recieves alot of ressistance, it shuts down.

for the psp power cord, it will reset itself

for the powerbrick, simply plug it into the charger and then unplug it.  then plug it back into the zaurus and it works


the power brick shuts down on occasions and it must be "unlocked" by plugging it into a charger such as the zaurus sharp power cord ea-70 example.

they dont necesseraly break.  i noted this when i added a amprage meter to test the amp output.  they shut down and lock up.
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Reading about all these reports on the PSP power brick makes me really want to buy one. The only problem is that the PSP is not out yet here in Australia  so naturally, none of the PSP accessories are available yet either. Anway, I will go to Thailand and see if I can find it in Pantip which is a HUGE shopping mall for electronics, much bigger than SimLim in Singapore.

[Cresho]

if you like meanie, i can send you one.  ill open and charge it up, test it and send you one.

its only 20 dollars and probably 5-10 dollar shipping.

in any case, just paypal me cresho@earthlink.net and ill pm you that i sent you an item.  if its blown, all i can say is tough luck cuz shipping it right back costs more than what the psp costs itself.

anyway, 20 dollars plus american tax which is 8.5% for a total of?
then the cost of shipping which the unit weighs in at a pound probably.

your call man.

[Meanie]

if you like meanie, i can send you one.  ill open and charge it up, test it and send you one.

its only 20 dollars and probably 5-10 dollar shipping.

in any case, just paypal me cresho@earthlink.net and ill pm you that i sent you an item.  if its blown, all i can say is tough luck cuz shipping it right back costs more than what the psp costs itself.

anyway, 20 dollars plus american tax which is 8.5% for a total of?
then the cost of shipping which the unit weighs in at a pound probably.

your call man.
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Cresho,

thanks for the offer, but I will be going on a shopping tour around asia next week so I'll be buying lots of toys that I've probably never heard of yet

[gatewood]

What about those charging things for the PSP that have four AA batteries in them? I got one of those with a bunch of PSP accessories. If it would work for the PSP, wouldn't it work for a Zaurus? I'm not going to try it without hearing from one of you guys first. I'm still a complete Zaurus newbie, and I am so afraid of bricking mine. I wouldn't be able to put a new OS on, or anything, at this point.

 

[Cresho]

the katz one..yeah i seen it for 20 dollars as well

comes with headphones, extra cd cases for psp, keychain, keychain power.

the case looks great and i could of easily stored my AAA batteries in them.

Nope...never tried it.

the pelican cig liter puts out 1.5 amps compared to the zaurus .1-.3 amps.

it is dangerous since it varies greatly.  the more amps, the more electrons flows through  a path, the more heat.

Do this.  if you can visibly see resistors in your case, then you will probably be fine.

if you just see wires going in from battery to outlet to zaurus with no mobo or resistors, then you probably gona have a problem.

I have 4 AAA batteries @850mah each which equals 3400 capacity.

now when i add my volt meter raw like to this 4 put together, i get 5.10v@10 amps which is very very dangerous.  that is why we need to test amp output

it should be within zaurus default range..............   which is .10-.30 or for the ea-70s .5 amps

[gatewood]

the katz one..yeah i seen it for 20 dollars as well

comes with headphones, extra cd cases for psp, keychain, keychain power.

the case looks great and i could of easily stored my AAA batteries in them.

Nope...never tried it.

the pelican cig liter puts out 1.5 amps compared to the zaurus .1-.3 amps.

it is dangerous since it varies greatly.  the more amps, the more electrons flows through  a path, the more heat.

Do this.  if you can visibly see resistors in your case, then you will probably be fine.

if you just see wires going in from battery to outlet to zaurus with no mobo or resistors, then you probably gona have a problem.

I have 4 AAA batteries @850mah each which equals 3400 capacity.

now when i add my volt meter raw like to this 4 put together, i get 5.10v@10 amps which is very very dangerous.  that is why we need to test amp output

it should be within zaurus default range..............   which is .10-.30 or for the ea-70s .5 amps
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When I open it up, the area that MIGHT have resistors, is still hidden. I'll try to disassemble it later. But I think there's just a straight shot from the wires to the outlet. I won't try it, anyhow, until I can get a better look. But, on the Katz stuff, the case (which really is a great one) fits my SL-6000 like it was made for it.
 

[Cresho]

maybee i should buy one for testing purpouses

[rebski]

If you are in the mood for testing have you seen this one?

http://www.geekstuff4u.com/product_info.ph...products_id=233

[Cresho]

it is boerderlining  "my zaurus is too hot"

yeah it will generate heat on your zaurus or the wire connected to it.

[xdivider]

Juz bought a unknown brand (Pantherlord???) 4200 mah PSP battery and plugged in the 3000 without testing (Okay Im reckless and impatient, but Im also the fool who did plug 4 1.5AAs in to charge and survived). It works for both the Z and a nokia (with a custom head). I managed to grab hold of a friend with a multimeter, and found that when plugged to a usb charging cable, the voltage is around 5.4V. Couldn't get a reading when the battery is by itself although i tested it to work.

[waalkman]

In regards to the squealing/shutdown issues...


Look at the link rebski provided:

http://www.geekstuff4u.com/product_info.ph...products_id=233

You will see various ratings. Under battery life it lists the output as 5 volts with a capacity of 1 amp hour (1000 mAh). So you get 5 volts at one amp for one hour (or 5 volts at 1/2 amp for 2 hours, etc)

Looking at the battery capacity rating, you see 3.7V 2000 mAh. This means that the internal battery is rated to deliver 3.7 volts @ 2000mAh.

To get the 3.7 volts to 5.0 volts there has to be some sort of DC - DC convertor involved. These typically use PWM (Pulse-Width Modulation) and in some designs the frequency of the PWM is in the audible range (in other words you can hear it).

They also have internal shutdown circuitry should the load get too high.

Hope this helps.


For anyone ambitious...

http://focus.ti.com/lit/ds/symlink/tps62300.pdf