AA battery powered mp3 player?

How about an mp3 player that uses a popular cell phone battery? Some of those battery models retail on the net for only around $5 or so each, and are easy to find. They seem to be 700 mah or more and 3.7 v, or at least 30% more capacity than the battery in the Fuze. I want to be able to carry spare batteries, and swap the battery quickly when it is out of power.

for those who wants and AA powered mp3 player we already had things like those that why the stop making those it was a waste of time and now its time to help the enviroment by using these batteries that last for up to 2 years

"for those who wants and AA powered mp3 player we already had things like those that why the stop making those it was a waste of time and now its time to help the enviroment by using these batteries that last for up to 2 years "

There are AA nimh rechargeable batteries. AA does not mean alkaline. To help promote the use of rechargeables, a player could be bundled with a charger and two AA nimh batteries, as these are very inexpensive.

Nobody makes AA power mp3 players

"Nobody makes AA power mp3 players "

They have been made in the past though, and might be made in the future. I would also like to see mp3 players built around an inexpensive easily swappable cell phone battery, such as the Motorola BR50. The BR50 is used by the Razr, has 710 mah at 3.7 V, and sells for around $7 on the net with shipping.

if you want a player with AA batteries buy the old sansa models end of story.

@jk98 wrote:

"Nobody makes AA power mp3 players "

 

They have been made in the past though, and might be made in the future. I would also like to see mp3 players built around an inexpensive easily swappable cell phone battery, such as the Motorola BR50. The BR50 is used by the Razr, has 710 mah at 3.7 V, and sells for around $7 on the net with shipping.

 

 

“if you want a player with AA batteries buy the old sansa models end of story.”

 Sandisk never made any AA battery based models, just AAA based ones. Other companies made AA battery based players, however they had 2 GB or less of storage. I want a player with great sound quality, at least 4GB of internal storage, and a card slot.

How about an mp3 player that uses a Motorola BR50 battery? That battery is 710 mah and 3.7 v. A Player around the size of the Clip+ that uses an easily swappable(not soldered in) BR50 battery. The BR50 has over double the power of the battery in the Clip+. Imagine a Clip+ sized player(or just a tiny bit larger) that gets 32 hours of battery life, and for which the battery is easily swappable and someone can carry spare batteries. A BR50 battery is only around $7 retail on the net.

Just ran into this on another search for the same thing. This is not what most people would want but comes really close to me getting it.

http://www.sourcingmap.com/portable-white-music-player-tuner-sdmmc-card-compatible-built-128mb-flash-p-13253.html

Unfortunately no photo, only 1 in stock etc, not a brand name.

Takes 4 AA batteries, has an external charger, speakers, sd card, 2 alarm clock settings. 

Unfortunately nearly 8 inches long and only goes up to 8 kbps. If it went to 16 I’d get it. Most of my stuff isn’t music, just speaking and with the headphones this would be fine for travelling, at least for me. It would be nice to have a travel alarm that holds extra batteries too, a little more reliable when you have a flight to catch. It is cheap enough that with just that 16 kbps improvement they would have had me trying it out.

I agree… AA batteries are great!  They are cheap, available and last a long time.

I have an old Cowon G2 that uses ONE AA and it lasts probably 40 hrs. 

Now, after using the Fuze for nearly two years, I have no problem with the built in 

battery.  I really like the form factor of the Fuze.

My only wish now would be for the Fuze  to have a user replaceable battery.

That would be great. 

This discussion is continuing here.

http://www.anythingbutipod.com/forum/showthread.php?p=429511#post429511

A Clip+ gets 12 hours of play time with a 3 hour charge. So play time is only 4x charge time. Using a player that gets 40 hours of play time on a 2900 mah AA nimh battery and a 15 minute charger that charges 4 AA nimh batteries at a time, one would get 160 hours of play time with 15 minutes of charging, and have play time that is 640 times charge time!!!

Except that 15 minute NiMH chargers abuse the cells, leading to capacity loss and premature failure. An hour is the shortest charge cycle that doesn’t damage the cells. If you’re interested in such things, there has been EXHAUSTIVE discussion of batteries over at CandlePowerForums.com - though as you might imagine, predominantly in the context of flashlights and other lighting devices.

@furrbear wrote:

Except that 15 minute NiMH chargers abuse the cells, leading to capacity loss and premature failure. An hour is the shortest charge cycle that doesn’t damage the cells. If you’re interested in such things, there has been EXHAUSTIVE discussion of batteries over at CandlePowerForums.com - though as you might imagine, predominantly in the context of flashlights and other lighting devices.

My charger happens to be a half hour one. Rotating through the same 2 pairs of AA in my camera, maybe weekly charging, I had the first cell go bad after 4 years.  My kid’s AAA’s lasted nearly 2 years of being run down to zero in her DAP before swapping, charging a couple times/week (they still worked, but around half capacity)  Both sizes got better life than most Li batteries I’ve used. 

 

Different brands of cells can be designed so they can or can’t take fast charging as well.   From reading some of the ad copy, there’s also some spin going on by MFR’s that don’t make fast smart chargers (or good fast charging batteries) to make their own gear look better.

 

     I’ve been in some groups dealing with lighting (on bikes) and they often run them until the light is too dim to use which is hard on batteries, since a slight mismatch in cells will lead to some getting reverse charge.  Electronic gear usually cuts you off when the voltage reaches some still safe level.

Message Edited by donp on 01-09-2010 09:06 AM

@tapeworm wrote:


@vidra wrote:

The advantage of rechargeable NiMH batteries are as follows:

Respectfully discussing:

  • much higher capacity. The Li-ion battery in my Fuze lasts 15-20 hours on a single charge, whereas one 2300mAh AA battery in my old i-River lasts over 40 hours, which is more than double the capacity. This was on you old i-river. How can you know what the charge/play time would be on the Sansa?

 

Fuze batteries I’ve seen for sale are 550 mah 3.7 volts.  So in total energy this NiMH is about 50% more (2.3 amphours *1.2 volts).  Note you can get higher capacity NiMH,  

I agree that for normal use the larger capacity mp3 players that I can just plug into the wall or pc are much better, however I’m about to deploy for Haiti next week and am looking for a battery operated mp3 player that I can buy to bring with me.  I really don’t care about a sleek design and just want something that I can use to listen to music while i’m there.  Since I will be in an environment where there really is no power, except for our own generators (which isn’t to be used for charging personal electronics) it really would be much easier to bring extra batteries, and not have to worry about the internal battery going dead after 12-15 hrs.  I will be there for 2 weeks so something that only gives me 12-15 hrs there is not even worth bringing there if I can’t charge it afterwords.

There are battery pack devices that take 4 AA batteries and charge usb devices from them. If you decide to get one, make sure it has a voltage regulator. I have the Tekkeon mp1550 ($20) which works well with nimh rechargeables. I think using alkalines in such a device though might not be that efficient, and perhaps a bit more than half the power will be wasted as heat. You could pre charge several sets of 2900 mah nimh batteries in a one hour charger, or buy some Sanyo Eneloop or Duracell precharged 2000-2100 mah low discharge rate nimh batteries. 

There are usb crank chargers, and usb solar chargers, however I have not tried those. Another option is to buy a large capacity lion battery pack.

Just stirring the pot . . .

http://www.anythingbutipod.com/archives/2010/01/mp3-player-battery-guide.php

@tapeworm wrote:

Just stirring the pot . . .

 

http://www.anythingbutipod.com/archives/2010/01/mp3-player-battery-guide.php

 Though the author is not for replaceable batteries, the majority of responders are.  

Oddly, though the web site is “anything but ipod,” the author of that article owns 2.

AFAIK Ipod was the first mp3 player with sealed batteries so lead the way for this type of design.

 

 

donp wrote:

AFAIK Ipod was the first mp3 player with sealed batteries so lead the way for this type of design.

True. I even remember the ‘outrage’ voiced by people over this. You could send the player in and Apple would replace the battery (or give you a complete re-furbed unit), but you couldn’t replace it yourself.

Nonetheless . . . it didn’t slow down their sales any. The fact that the Pod is #1 in the market year after year implies that the majority of people want smaller, thinner devices and don’t really care that much about battery life, whether the battery is standard or even replaceable at all. They just want their tunes . . . at any price.