Battery size: AAA vs. AA, C and D

Topics unrelated to a specific category.

Battery size: AAA vs. AA, C and D

Postby Argaman_Bergman » Thu Jul 20, 2006 2:00 pm

I have seen several posts where people considered to use battery other then AAA for their players. To help them all, I bring here a "table" comparing the different 1.5v standard battery types, so you could compare the theoretycal amount of performance you could get, along with weight of battery. I use information that comes from Energizer's site, so it could compare only to their batteries, and in general consider it all as it is, something you could get only at ideal conditions. In ( ) you have values compared to AAA. I have assumed 9.5 hours for the AAA type.

AAA: 11.5gr (x1), 1250mAh or 9.5 hours of work (x1).
AA: 23gr (x2), 2850mAh or 21.85 hours of work (x2.3).
C: 66.2gr (x5.7), 8350mAh or 63.65 hours of work (x6.7).
D: 148gr (x12.8 ), 20500mAh or 155.8 hours of work (x16.4).

So in theory the most efficient battery is type D, because even if it's ~13 times havier, it gives you over 16 times play time. Note that 512MB player can hold only some 9 hours of MP3 @ 128kbps :)

If anyone have any comments I would very much like to read them!

Argaman
Argaman_Bergman
 
Posts: 10
Joined: Sun Jul 16, 2006 10:16 pm

Postby ian_hawdon » Fri Jul 21, 2006 5:36 pm

Made sticky, this sounds like an interesting project!
Who is General Error and why is he reading my hard drive? :D

If any of my posts have helped you, or if you're interested, click this link and sign up to help me get a free iPhone: http://apple.real-incentives.com/40461
User avatar
ian_hawdon
Site Admin
Site Admin
 
Posts: 978
Joined: Wed Aug 24, 2005 7:00 pm
Location: Newcastle Upon-Tyne, England

Re: Battery size: AAA vs. AA, C and D

Postby altean » Sat Jul 22, 2006 9:34 pm

Argaman_Bergman wrote:I have seen several posts where people considered to use battery other then AAA for their players. To help them all, I bring here a "table" comparing the different 1.5v standard battery types, so you could compare the theoretycal amount of performance you could get, along with weight of battery. I use information that comes from Energizer's site, so it could compare only to their batteries, and in general consider it all as it is, something you could get only at ideal conditions. In ( ) you have values compared to AAA. I have assumed 9.5 hours for the AAA type.

AAA: 11.5gr (x1), 1250mAh or 9.5 hours of work (x1).
AA: 23gr (x2), 2850mAh or 21.85 hours of work (x2.3).
C: 66.2gr (x5.7), 8350mAh or 63.65 hours of work (x6.7).
D: 148gr (x12.8 ), 20500mAh or 155.8 hours of work (x16.4).

So in theory the most efficient battery is type D, because even if it's ~13 times havier, it gives you over 16 times play time. Note that 512MB player can hold only some 9 hours of MP3 @ 128kbps :)

If anyone have any comments I would very much like to read them!

Argaman

actually i'm browsing for heftier 3.6 lithiums so I could attach it to the back of my player with a velcro or something similar or even better, make the rear a bit larger out of some plastic material so the larger battery can fit under the hood :)
I'm testing my old cellphone battery as we speak.
Things you can't get enough of --> harddrive space, memory, processor speed and video-3D rendering power.
User avatar
altean
 
Posts: 23
Joined: Wed Jul 19, 2006 5:15 am
Location: you like it up here, eh?nice and cool like my beer :P

Re: Battery size: AAA vs. AA, C and D

Postby Argaman_Bergman » Sat Jul 22, 2006 11:24 pm

altean wrote:actually i'm browsing for heftier 3.6 lithiums so I could attach it to the back of my player with a velcro or something similar or even better, make the rear a bit larger out of some plastic material so the larger battery can fit under the hood :)
I'm testing my old cellphone battery as we speak.


As far as I know, the 3.6 Lithium doesn't have much higher capacity then the regular batteries and they are usually more expensive. Their advantage is usually for something that needs a lot of electric power for short period of time, like a camera's flash, and the fact they weight less then the Alkaline counterparts.

However, if I'm wrong, it would be interesting to hear how much playing time you could squeeze out of it :)

Argaman
Argaman_Bergman
 
Posts: 10
Joined: Sun Jul 16, 2006 10:16 pm

beefier batteries

Postby altean » Fri Aug 04, 2006 3:50 am

just go check out ebay for those bigger capacity batteries.
I've seen some 3.6v lithiums with greater current capability and not so much larger in physical size.
you could switch to AA also, however you need to mod the player for it.
I'm talking about the ones that uses the atj2085. you can download the pdf for it and see the pinout and read about the mod needed to be done for diff batteries.
p.s. if you guys need some schematicsabout the atj2085 or a nanoclone I have posted it on the mympxplayer.com.
Things you can't get enough of --> harddrive space, memory, processor speed and video-3D rendering power.
User avatar
altean
 
Posts: 23
Joined: Wed Jul 19, 2006 5:15 am
Location: you like it up here, eh?nice and cool like my beer :P

Postby dotdotdotz » Fri Aug 04, 2006 8:09 am

for D batteries...... won't you need something to reduce the voltage from 2.5v to 1.5v? will there be any loss of efficiency from that?
dotdotdotz
s3 poster
 
Posts: 75
Joined: Sat Jun 10, 2006 8:00 pm

Postby Argaman_Bergman » Sat Aug 05, 2006 2:02 pm

dotdotdotz wrote:for D batteries...... won't you need something to reduce the voltage from 2.5v to 1.5v? will there be any loss of efficiency from that?


Nope, D is also 1.5v
Argaman_Bergman
 
Posts: 10
Joined: Sun Jul 16, 2006 10:16 pm

Postby Zim_256 » Fri Feb 09, 2007 12:19 pm

YOU CAN'T USE A 3.6V LITHIUM-ION BATTERY; THE ATJ20-- WAS DESIGNED TO USE ONLY ONE OR TWO 1.5V AA OR AAA OR EQUIVALENT BATTERIES. WITH A 3.6V LI-ION BATTERY YOU CAN KILL YOUR PLAYER BY OVER-VOLTAGE. SEE THE DATASHEETS FOR MORE INFORMATION, THE ATJ20-- WAS NOT DESIGNED TO WORK WITH MORE THAN 3V.
Z6 Comp Sys
User avatar
Zim_256
s1 mp3 poster
s1 mp3 poster
 
Posts: 249
Joined: Thu May 25, 2006 5:47 pm
Location: Argentina

Postby milad » Mon Feb 12, 2007 11:18 am

hi

i dont agree with you Zim_256 i add new ION battery with 3.7v to my 2085 chip and my player work great :D

bye
Model:Apacer AU822
Mainboard:K2TJ1061006305
Chip:2085H
Battery:230 mAh 3.7v
Flash Chip:K9K8G08U0M
Firmware:ACTS16D_37 3.5.38
Zhaleh Theme: http://forum.s1mp3.org/viewtopic.php?t=6725
User avatar
milad
Moderator
Moderator
 
Posts: 858
Joined: Mon Oct 30, 2006 9:42 am
Location: Iran-Sanandaj

Postby Zim_256 » Mon Feb 12, 2007 6:53 pm

milad wrote:hi

i dont agree with you Zim_256 i add new ION battery with 3.7v to my 2085 chip and my player work great :D

bye


Your board can have another type of battery power management, specially if it's a mp4 player with built-in LI-ION battery.

For normal 1.5V AAA players, connecting a LI-ION battery directly on the battery pins could cause serious damage.
Z6 Comp Sys
User avatar
Zim_256
s1 mp3 poster
s1 mp3 poster
 
Posts: 249
Joined: Thu May 25, 2006 5:47 pm
Location: Argentina

Postby milad » Wed Feb 14, 2007 12:31 pm

hi

thanx buddy i agree what is your Skill?

bye
Model:Apacer AU822
Mainboard:K2TJ1061006305
Chip:2085H
Battery:230 mAh 3.7v
Flash Chip:K9K8G08U0M
Firmware:ACTS16D_37 3.5.38
Zhaleh Theme: http://forum.s1mp3.org/viewtopic.php?t=6725
User avatar
milad
Moderator
Moderator
 
Posts: 858
Joined: Mon Oct 30, 2006 9:42 am
Location: Iran-Sanandaj

Postby Crunchy » Sun Apr 01, 2007 8:06 pm

You can always safely attach anything up to 5V via the USB power lines.
USB runs on 5V, so your player HAS to be able to handle that, or else it would burn out every time you plugged the player in your PC.

As for the specs: I recall something about li-ion being a supported battery type, but that was at least a year ago, so please don't try it and burn out your player!
things to do before I die:
1) achieve immortality
all other things can wait

player:
512MB, no FM, 7 colours, 3 animations
board number: LJD-02+3V0.2 2005-01-28
User avatar
Crunchy
Site Admin
Site Admin
 
Posts: 563
Joined: Wed Aug 24, 2005 11:00 pm
Location: Nijmegen, Netherlands, Europe

Postby Zim_256 » Sun Apr 01, 2007 9:49 pm

Crunchy wrote:You can always safely attach anything up to 5V via the USB power lines.
USB runs on 5V, so your player HAS to be able to handle that, or else it would burn out every time you plugged the player in your PC.


The USB port provides +5V only for powering the external electronics related to any small peripheral you can connect to the port, the use of the +5V is up to the peripheral, it can use the power or can leave it floating or disconnected.

The DATA LINES (D+ and D-) runs on 2.8V to 3.6V, The S1MP3 can handle 3.3V, NOT 5V.

For the MP4 and MP3's with built-in Battery and recharging possibilities, inside the player exists recharging circuits and voltage regulators that convert the +5V to the voltage needed to recharge the battery.

The ATJ, if powered from the USB port (ie: connected without batteries) get's its power indirectly by an ATJ external regulator giving 3V and then regulates it's own power through the internal DC-DC converter.
Z6 Comp Sys
User avatar
Zim_256
s1 mp3 poster
s1 mp3 poster
 
Posts: 249
Joined: Thu May 25, 2006 5:47 pm
Location: Argentina

Re: Battery size: AAA vs. AA, C and D

Postby rajakumarn » Sun May 11, 2008 2:43 pm

what I should do to connect a 3.7v li. battery to my AAA operated mp3 player.is the any way to modify my circuit.
rajakumarn
 
Posts: 8
Joined: Tue Nov 13, 2007 1:53 pm

Re: Battery size: AAA vs. AA, C and D

Postby thomasz » Wed Jun 18, 2008 1:35 am

Great! I hope someone will read it clearly. :wink:
thomasz
 
Posts: 11
Joined: Wed May 21, 2008 4:27 am

Next

Return to Miscellaneous Problems

Who is online

Users browsing this forum: No registered users and 1 guest



cron