inputs.text: worked not easy stated - battery nice replacehement garmin forerunner 305 watch putting not easy youtube videos make hard part cutting watch open razorblade process took 30 minutes not careful cut rubber coating outside watch slip blade cut sides wires inside watch short thin careful strip solder thehem new battery important part clean old glue lip reglue everything not get old glue not get good connect bottom watch top reason important pressure connection battery circuit bottom watch circuitry top excess glue cause gap top bottom circuit keeping watch functioningthe difficulty changing battery not replacehement batteries fault garmins garmin made process easier want get watch working battery need went 20 minutes operation time 4 hours thanks battery saved 150 new watch