Time for new cranking battery? Opinions please.

[Oldgeezer]

My starting Interstate 27M-XHD battery loses voltage quickly. When fully charged, a voltmeter reads 12.55 volts after waiting 3 hours after charging. When I put the Stratos power switch on and take a reading approx. 1.5 hours later, then the reading is 12.15 volts. Seems like a "lot" of discharge in a short period of time since I am not running any electronics,etc. The battery is vintage 2004. Time for a new one? Motor is Pro XB 250 and I also run two graphs connected to the battery when fishing. Thanks for any input(s).

[rangerguy]

Don posted this above.
http://www.bbcboards.net/zerothread?id=310172

[EuropeanAM]

Although battery voltage will usually "stabilize" into the 12.4-12.7 VDC range (after charger is removed), I would recommend replacing that battery.

Shoot for something of a higher capacity (such as those on the list mentioned above).