Summary: We also found several complaints that the firmware updates can be prone to glitches. When the battery does work, users say it lasts around 16 hours with judicious use of the "pause" mode or about eight hours of continuous use. Garmin specifies battery life at 14 hours, or up to 18 hours if you make use of an optional AA alkaline battery pack (*Est. $30).
Pros: Great range, Loaded with features, Reliable GPS
Cons: Unreliable belt clip, Complaints about battery issues, Glitchy firmware
Excerpt: The Garmin Rino 655t GPS with two way radio updates the Rino 530HCx with a touch screen interface, preloaded100k scale topo maps, triaxial compass and 5MP geotagging camera. In addition, the 655t gets the other goodies common to recent Garmin handhelds, including BirdsEye aerial imagery , along with a barometric altimeter .