Uninterruptable power supply for mp3 player

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valtih1978

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For some reason this question was banned at bestbuy. So, I ask here

I have Roadstar MPS-020N MP3 player

MPS-020-PK.jpg


It supports huge sdcards, gigabyts (seen as days) of mp3 music. The battary howerver is much shorter and player is not being able to save its last position before going off and it cannot play longer than its battery. It cannot even play connected to PC for recharging (it switches into USB storage mode for transferring files. I do not know why this mode is so improtant after it is significanly slower than using PC SDCARD reader for loading the music). I do not like my player going off while charging. I also hate keeping desktop PC on for charging. I have tried some unnamed USB power adapter

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in the hope to obviate both problems at once. This had no effect -- player goes off as soon as I attach it to the adapter miniUSB. WTF? Can you explain this? Is there more intelligent player-power match? Is there a definite guide on MP3 players, which highlights technical characteristics of MP3 players, like charging pecularities and EEPROM for tracking the last playback time, instead of their color?
 
The Sansa clip+/zip with Rockbox will do everything you've described.
Although I'm not sure about the ampere rating of the power adapter you would need to use with the clip (ideally ~0.5A)
 
Is it ever possible that you charge while device is operational? I have heard that high-quality notebooks degrade their battery completely if you power them online while working.
 
Yes. Keeping any button pressed as the USB cable is connected allows the clip to charge without going into storage mode.
A standard USB port, which is the intended charging device for the clip, delivers around 0.5A over 5V. This should keep your device effects safe.

However dedicated charging USB ports may chuck out >0. 5A which is beyond the recommended spec and may damage your device.
 
It would be a miracle if what you say is true. I have checked that Sansa series of players, none exposes the rechargable playback as a selling point. I have asked if what you say is supported at official forums, but they fail to confirm http://forums.sandisk.com/t5/User-g...ack-unterruptable-by-power-supply/td-p/337551

And this is electronics.stackexchange discussion that I have discovered today http://electronics.stackexchange.com/questions/12781
It explicitly discusses Sansa Clip being not different from other mp3 players and ways to circumvent the issue. Let's see if you are telling the truth.
 
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valtih1978 said:
It would be a miracle if what you say is true. I have checked that Sansa series of players, none exposes the rechargable playback as a selling point. I have asked if what you say is supported at official forums, but they fail to confirm http://forums.sandisk.com/t5/User-g...ack-unterruptable-by-power-supply/td-p/337551

And this is electronics.stackexchange discussion that I have discovered today http://electronics.stackexchange.com/questions/12781
It explicitly discusses Sansa Clip being not different from other mp3 players and ways to circumvent the issue. Let's see if you are telling the truth.
Click to expand...

Please take a look at my initial comment
"The Sansa clip+/zip with Rockbox will do everything you've described."

Rockbox is required for these functions (and many more). If you would like to know more about Rockbox and it's many functions take a look at their manual (link below)
http://download.rockbox.org/daily/manual/rockbox-sansaclipzip.pdf

If you would like to know specifically about playback while charging, see the link below:
http://www.rockbox.org/wiki/SansaFAQ#How_do_I_get_my_RockBox_SanDisk_to_play_while_being_charged_63
 
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