The standard 9Cap has a current drain of about 300ma.
For you to get 4 hours, you must be using a 1200maH pack or something close to it.
Unless something has changed, the standard pack for the 9C is 600maH.
Not sure how you are getting 4 hours from a standard pack.
Not questioning your statement, but could you help me understand?
ORIGINAL: Stripes
ORIGINAL: masonman
... About 28 mins is all i can get...
I get about four hours with the original factory battery.