In search of a laptop battery..

[kitkit201]

hey everyone

my girlfriends' laptop is dying now because the battery isn't holding a charge.. does anyone know of a place online that sells batteries for cheap? or anyone that does ?? specially I am looking for this type of laptop.. with its many incarnations..

COMPAL N20U
SCEPTRE SOUNDX 7300
AMETHYST 20U
CHEMBOOK 2020
KDS THINNOTE 2300


thanks in advance!

wilson!