Hi Pulz! 5130's model is well `n good and i've xperienced a contiuous tlk-tim of 3+ hrs & Stnd-by tim of 2&1/2+ days with optimum use of cell. i've been using it since a yr n i utilized its battery for 270+ hrs till d date still its supporting well. The only care tht we shud tak for any new cell is to allow full charge & discharge of its battery `n we must avoid over-night charging.
So go for 5130.. its worth buying!
C h e t a n