samsung galaxy watch active2 (40mm, pink gold) (renewed) samsung electronics battery built for endurance the galaxy watch active2 s long-lasting battery can go for more than a day5 on a single charge, and you can always get a quick boost from your compatible galaxy phone with wireless power share.6 works with qi compatible samsung devices (compatibility with non-samsung qi devices not guaranteed), speed and power efficiency of charge varies by device and may be restricted by cases or covers.