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The battery for this player lasts 1Day(mp3) and 5-7hrs(video.) You cannot fit a replacement yourself as you will have to take the player apart. Proffessional help is advisable. A replacement battery will cost around 15$.
And you can carry but cannot view documents on this player. Here are the complete specs for your player
: United States
Digital storage media type
Digital Player / Recorder
Digital player supported digital audio standards
Digital player response bandwidth
20 - 18000 Hz
Digital player sample rate
48 KHz=8 KHz=11 KHz=32 KHz=44.1 KHz=16 KHz=22 KHz
Digital player signal-to-noise ratio
Digital Player total harmonic distortion
Digital player ID3 tags support
Digital player additional features
Variable bit-rate compatible,
Battery Enclosure Type
1 x Lithium polymer Rechargeable Internal
Battery Life Details
Video playback 6 hour(s),
MP3 playback 30 hour(s)
1 x Headphones Mini-phone stereo 3.5 mm,
1 x USB
It says "upgrader" because it is looking for a firmware upgrade - you will not be able to get rid of this message without doing the firmware upgrade - go to the rio website and follow the instructions for doing a fimrware upgrade - the msg will be removed, and you will be good to go
Try looking at Ebay item # 350057466979 or simply search for rio karma battery and you will find what you need. Replacing is as simple as taking some screws off and opening the rio. Don't have someone else do it because it is a simple thing that won't be worth paying someone else to do it.
There's no replacement for it, you have to recharge the battery by installing the software provided onto your computer, then simply connecting the player with the USB connector. When it's connected, it'll start to recharge.
I took ny Rio Nitrus apart trying to fix the screen & noticed that the rechargable battery connects to the motherboard with two flimsy little wires and a pinhead worth of solder. If you've tried everything else, it'd be worth your time to take off the back and have a look 'cuz a drop could easily have shaken one of these wires loose.
I read about this place -
Immergut Battery Haus Inc.
540 West Main Street
New Holland, PA 17557
someone got a battery for a rio riot from them for just 20 $. But taking the battery out wasn't so simple, you should call them to consult.