This is the battery for your Panasonic 500 Cell Phone

 

Outline Model Type Capacity Price 
Panasonic 500 cell phone battery B-7529 NiMH
(Ultra Slim)		 4.8v
880mAh		 $36Cdn
($26US)
Panasonic 500 Cell phone battery B-7530 NiMH
(Extended Capacity)		 4.8v
1300mAh		 $36Cdn
($26US)