I have been trying to locate a place to buy batteries to replace in two MP4 players.. the black one is my friend's and the batter info is (some is about unreadable on the battery) ?huo yven 0420409p 3.7V 230mAH... Haven't taken the other one apart yet since I can still use it plugged into stereo in truck and run off charger power but it needs replaced, too (maximum 20 minute run time on battery)

I've tried searching and either run into a place that doesn't have them or trying to sell an entire unit... One place showed a plastic cased battery that looks as big as the units so I KNEW that one wouldn't work... any help or links would be appreciated.

Pix of the items:

Brand and model of the player

These are Chinese players and are only called MP4 players... Even the box mine came in only says MP4 Player... these are the ones falsely advertised on Ebay last year as 4GB players that were hacked to show 4 GB when they ranged anywhere from 256MB to 2Gig max (had to go thru a couple reformats to remove the stupid hacks). The closest to a brand name is the Samsung memory chip inside.