What's an "upgraded power pack"?

"G24017" wrote in news:hLupb.25697$Ec1.2351814@bgtnsc05-
news.ops.worldnet.att.net:

Sony 7600GR Portable SW/FM receiver. 5 * rating - Immaculate - includes
upgraded power pack - and reel antenna. Original box and manual.

Details at: http://www.rnw.nl/realradio/icf-sw7600gr.html

$110 firm + shipping (Paypal or MO) -- reply to: