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Battery For Pandora


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#16 chame

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Posted 20 December 2008 - 07:36 PM

QUOTE(GoaLitiuM @ Dec 20 2008, 05:31 PM) View Post

But it is still more than 4000mAh right?
Besides doesn't that result longer battery life by not charging it full?


no, lipo & li-ion like to be 100% charged and if possible charged slowly. leave one of those discharged too much time and they will be damaged.

in fact both can be charged to 70% in about 30 minutes, but in order to get 100% and better life time they need more time, the last 8% is important

charging time depends on the charging power of course

I didnt see the specs of the case, but seems to be at least 16cm wide, maybe could fit pretty well



#17 DXR_13KE

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Posted 21 December 2008 - 11:54 PM

QUOTE(Tozarian @ Dec 20 2008, 05:48 PM) View Post

Vegeta,what does the scouter say about the voltage and milliamps?


*SMASH* THEY ARE OVER 9000!!!!!!

#18 Wolfsclaw

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Posted 22 December 2008 - 12:51 AM

WHAT, 9000 ?! THERE'S NO WAY THAT CAN BE RIGHT!

#19 pelrun

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Posted 22 December 2008 - 08:15 AM

QUOTE(chame @ Dec 21 2008, 05:36 AM) View Post

no, lipo & li-ion like to be 100% charged and if possible charged slowly.


Actually, about 40% charged will yield the greatest lifespan. Full charge and higher temperatures will make a battery die faster.

If you follow the very strict charging profile you can actually charge them quite quickly without ill effect (as long as they stay cool, which is the main limiting factor) but of course even a little overcharging will make them go boom.

Edit: I'd just like to mention that you should see far better lifespans out of the pandora battery than you will from a laptop battery, simply because the P will run so much cooler than a laptop does. And you don't have to do anything special! smile.gif

Edited by pelrun, 22 December 2008 - 08:50 AM.


#20 Tor

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Posted 22 December 2008 - 08:01 PM

There's some incorrect information in this thread.

Li-ion doesn't "stop charging at 4.1V". First, no battery stops charging by itself (until you reach the safety voltage of 4.30V as every li-ion/li-poly battery should have built-in). The charging stops when the charging circuit in the _device_ decides to stop.
Secondly, where's this 4.1V coming from? My Palm devices charge to 4.24 V, with lithium-ion batteries. For the one where I have replaced the original battery with a lithium-polymer battery it of course charges that one to 4.24 volts too.

And I have never seen anywhere that lithium-ion batteries should be charged to a lower voltage than lithium-polymer. However, for both of them they will last slightly longer if you charge them to 4.10V instead of higher, e.g. 4.20V. But Palm charges to 4.24V anyway (it drops relatively quickly to 4.21V after you unplug) because this lifetime effect is really really small after all.

In short, we've got a good battery already (4000mAh lithium-ion), I see no point in going for something else..

Edited by Tor, 22 December 2008 - 08:02 PM.


#21 mali

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Posted 22 December 2008 - 08:18 PM

So then it should be possible to just drop in an other battery without having to change anything. Possible benefits of other battery options are more battery-life or gaining some additional space in the case to put mods in.

#22 Phawx

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Posted 06 January 2009 - 07:35 PM

Well it seems the new MacBook 17 inch uses Lithium Polymer in that bad boy as well to get upto 8 hours of battery life. Terrible decision to enclose it, but I think this may be Lithium Polymer batteries maturing more?

Too bad the design for the Pandora was intended for Lithium-ion. I'd like to see a mod available for this battery type.

Lighter+Greater Capacity for energy = Win

Edited by Phawx, 06 January 2009 - 07:40 PM.


#23 mali

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Posted 06 January 2009 - 08:00 PM

If someone points me to where to get a fitting Li-Polymer, I'd test it. I'd just solder some longer wires to it and put it somewhere, where it doesn't do harm, if it explodes(which it shouldn't, if the info given here is right) Some charge, discharge cycles while measuring its temperature compared to the original battery should give a correct real life result.

#24 ricki

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Posted 06 January 2009 - 10:30 PM

QUOTE(Tor @ Dec 22 2008, 09:01 PM) View Post
In short, we've got a good battery already (4000mAh lithium-ion), I see no point in going for something else..
Erm...
QUOTE
FAQ What kind of battery will it have?

Pandora will have a 4000mAh Lithium Polymer battery.
I always thought it will be a Lithium Polymer battery!? Did I miss anything?

#25 MWeston

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Posted 06 January 2009 - 10:30 PM

QUOTE(Phawx @ Jan 6 2009, 01:35 PM) View Post

Well it seems the new MacBook 17 inch uses Lithium Polymer in that bad boy as well to get upto 8 hours of battery life. Terrible decision to enclose it, but I think this may be Lithium Polymer batteries maturing more?

Too bad the design for the Pandora was intended for Lithium-ion. I'd like to see a mod available for this battery type.

Lighter+Greater Capacity for energy = Win

I know I have explained this before but it was a while ago. The battery in Pandora is a polymer battery.

#26 mali

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Posted 06 January 2009 - 10:52 PM

blush.gif
I should check my sig more frequently...

#27 Phawx

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Posted 06 January 2009 - 11:13 PM

Hah, How bout that.

#28 hede

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Posted 07 January 2009 - 07:56 AM

As far as I understand there will be a fully new designed battery for the Pandora, right?

I would prefer using a design compatible to some wide spreaded consumer products battery like AFAIK the openmoko freerunner has got one compatible with a nokia one. I mean, if pandora development dies in mid 2009 (I don't hope so) e.g. because all the developers get snaped up by some big company to produce the next gen psp or ds... cool.gif ... lio-battery-packs are known to have a limited lifespan. If pandoras battery pack is unique, where to get those in that case. Second: For wider spreaded consumer products there are more cheaper compatible battery packs available from independent retailers, anyway.

#29 Tor

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Posted 07 January 2009 - 10:58 AM

QUOTE(ricki @ Jan 6 2009, 11:30 PM) View Post

I always thought it will be a Lithium Polymer battery!? Did I miss anything?

My mistake there - however, my issue with the start of this thread was the strawman of describing polymer as different from (and superior to) ion as far as charging etc. is concerned - which it isn't, for all practical purposes.

Edited by Tor, 07 January 2009 - 10:59 AM.


#30 ricki

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Posted 07 January 2009 - 02:05 PM

Tor, I quoted you, but this was just one example. No offence.
It seemed as if everybody in this thread was sure we would get a LiIon-Battery. I just wanted to check if the FAQ is still correct at this point.