Pocket_Nano,
Thanks for the link. I went ahead and bought one. I'll post mp3 duration test with this battery (got 3-3.5 hrs with original 200mAh battery)...hoping to double that with this battery !!
I'm also looking into making a small polarized connector to be mounted on the back of th SY-158 player, that would allow connecting external battery pack in parallel with existing li-ion battery. Looks like 3 AAA cells (1000mAh) could be "swap-mounted" onto the back someway...I'll post results and pics, if this works out.
I also will try 4 AA Ni-MH cells connected into the USB port of the SY-158, to be used as a "portable" charger. These Ni-Mh AA cells are now up to 2600mAh rating !!
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